Across:
8 10 across (‘test’ = TEST-) is in hospital (-ER) (TESTER) checking athletes for drugs (TESTER),
9 Buries (CONCEALS) in shrouds (CONCEALS),
10 Opens 6 down (opens ‘test papers’ = TEST) to probe (TEST),
11 Bloodsucker’s (bloodsuckers = MOSQUITOES) knock-off (-QUIT-) ring (-O-) is for sweetheart (‘swEet’ heart = -E-) taken in by tree hugger perhaps (moss = MOS-S) (MOSQUITOES),
12 Benefit (PROFIT) to university worker (PROF-) getting it (-IT) (PROFIT),
14 Greatly (greatly) shaken (= anagram indicator) (greatly = LET-ARGY) consuming heroin (-H-) (LETHARGY) – it leaves one with lack of energy (LETHARGY),
15 Juice (PRESS) from a type of pear (CONFERENCE pear) (PRESS CONFERENCE) attracts media attention (PRESS CONFERENCE),
18 Welcomed (ACCEPTED) to Bar (bar = ‘except’ = ‘accept’ = ACCEPT-) Hearing (= homophone indicator) by journalist (-ED) (ACCEPTED),
20 Sequel (RESULT) to Ulster (Ulster) novel (= anagram indicator) (Ulster = RESULT),
22 Risky high flyers (TEST PILOTS) in 10 across (‘test’ = TEST) showing off (= anagram indicator) pistol (pistol = PILOTS) (TEST PILOTS),
24 Jeer (BOO-) team starting (‘Team’ starting = -T) (BOOT) in Wellington (wellington BOOT),
25 What a nightwatchman might do (STARGAZE) for sun (STAR-) on unfinished (a) strip on the Mediterranean (Gaza Strip) (‘Gaza’ without ‘a’ = -GAZ-) going towards Spain (-E) (STARGAZE),
26 Pleasant smells (AROMAS) from a (A-) chipper (-ROMA-) at top of the Strand (top of the ‘Strand’ = -S) (AROMAS).
Down:
1 Shooting star (METEOR) acting (= anagram indicator) remote (remote = METEOR),
2 Meant to leave statement (‘meant’ to leave ‘statement’ = stte = STET) and let it stand as it was (ignore marked correction = STET),
3 Most of those in 26 across (most of ‘aromas’ = AROMA-) have it (it) served up (= reversal indicator) (it = -TI-) cold (-C) (AROMATIC) and spicy (AROMATIC),
4 Things to face (face the ‘facts’) starting off (f) (‘facts’ without ‘f’ = ACTS) in circus routines (ACTS),
5 A French (a = UN-) sauce (sauce = -JUS-) for tempura starter (‘Tempura’ starter = -T) (UNJUST) isn’t right (UNJUST),
6 Examinations (TEST PAPERS) of probes (tests = TEST -S) going around the sun (The Sun PAPER-) (TEST PAPERS),
7 Visitor (caller) loses the head (c) (‘caller’ without ‘c’ = ALLER-) with soldier (-GI-) getting caught (-C) (ALLERGIC) – what sort of a reaction would you expect? (ALLERGIC),
13 Drop a line (FISH) to picky types (EATERS) (FISH EATERS) of pescatarians (FISH EATERS),
14 Ben is out of bed linen (‘ben’ is out of ‘bed linen’ = dline = LINED) that’s striped (LINED),
16 Make over (RECREATE) most of (d) the revolutionary (‘red’ without ‘d’ = RE-) forge (-CREATE) (RECREATE),
17 Broadcaster (RTE = ETR-) sets up (= reversal indicator) on centre court (centre ‘coUrt’ = -U-) to take stock of (-SCAN) (ETRUSCAN) what the old Italian is saying (ETRUSCAN language/people from ancient state of Etruria),
19 Like some Customs’ (TRIBAL) people (tribe) losing European (e) (‘tribe’ without ‘e’ = TRIB-) area (-A-) at port (port/left = -L) (TRIBAL),
21 Check out (LOOK AT) gents (LOO-) reviewing (= reversal indicator) a short clip of (e) film (‘take’ without ‘e’ = tak = -K AT) (LOOK AT),
23 The range (OVEN) of some Romanov enquiry (some ‘RomanOV ENquiry’ = OVEN),
24 Reserve (BOOK) heads ball on one knee (heads ‘Ball On One Knee’ = BOOK).