No 11989, Monday 24 Apr 2017, Gridman

ACROSS
1   Top assistance supplied in orbiting outposts (5,8) SPACE STATIONS*
8   Go in India without ultimately angelic light (4) HALO cHALO
9   Having understanding, clear up pet caught in a mess (10) PERCEPTUAL*
10 Spot a top source for starchy food (6) POTATO [T]
11 Poor inn I'd get redone (8) INDIGENT*
12 At unending tour, not one falling or wearing down (9) ATTRITION {AT}{TRIp}{NOT+1}*
14 Advance slowly in court house (4) INCH {IN}{CH}
15 Son leaves spot for a quick kiss (4) PECK sPECK
16 Six dial USA desperately for magnifying glass, say (6,3) VISUAL AID {VI}{DIAL+USA}*
20 Perhaps relating to the whole (8) INTEGRAL*
21 Fired up, the man put away diamonds (6) HEATED {HE}{ATE}{D}
23 Government official about to give away secret behind almirah (10) BUREAUCRAT {BUREAU}{C}{RAT}
24 Muslim leader captures hearts of Lima camp (4) IMAM {lIMa}{cAMp}
25 Songs sung in place for plants? Not exactly! (7,6) NURSERY RHYMES {NURSERY} {RHYMES} How do we classify this clue? [CD} - See comments

DOWN
1   A poster put out in Chennai, for example (7) SEAPORT*
2   8 get round to a Hawaii greeting (5) ALOHA {HALO}*{A}
3   Take advantage of extra — one in patch of land (7) EXPLOIT {EX}{PLO{1}T}
4   One fright in area will bring in these reservists (11,4) TERRITORIAL ARMY {TERRITOR{1}{AL ARM}Y}
5   Fashionable tear in shirt and front of underwear (6) TRENDY {T}{REND}{Y}
6   One month in the past ace cook stopped short of having many sides (9) OCTAGONAL {OCT}{AGO}{NALa}
7   Old comedian captures you finally with character that is firm (7) STAUNCH {STA{yoU}N}{CH}
13 Crook making noise about sages having stripped (9) RACKETEER {RACKET}{sEERs}
15 Publisher's bird (7) PENGUIN [DD]
17 World leaders' hard urge to disentangle (7) UNHITCH {UN}{H}{ITCH}
18 Pole's coverings, where I see paces going haywire (7) ICECAPS {I+C+PACES}*
19 Overly French-English combine admitted top drama group (6) TROUPE Anno pending (Addendum - {TRO{U}P}E} -See comments
22 Cut one old man's principle (5) AXIOM {AX}{1}{O}{M}

GRID