The Hindu Crossword 8185 Solutions - by Vinod & Rajagopal

Across
1 Coe is less involved with the triangle (9) ISOCELES (ana. COE+IS+LESS)
6 Animal goes round by the canyon (5) ABYSS (Animal=ASS, by=BY=>Animal goes round by=A(BY)SS)
9 Orange coloured flavouring (7) SAFFRON (Double Defn. - 1. Orange coloured 2. flavouring)
10 Something distilled from former wide expanse (7) EXTRACT (former=EX, wide expanse=TRACT => EX+TRACT)
11 Pertaining to race (6) ETHNIC (Direct)
12 Sensible logical thought (6) REASON (Direct)
15 Die to press on for despondency, somehow (10) DEPRESSION (ana. DIE+PRESS+ON)
16 Of fluid secreted by a surly dog (4) URIC (Of fluid=URIC(of urine); a=I, dog=CUR => ana. I+CUR(surly is the ana. indicator) -- Explanation thanks to Parasuram)
18 Wise men from the East (4) MAGI (Direct)
19 Empty tubes to find narrow trousers (5,5) DRAIN PIPES (Empty=DRAIN, tubes=PIPES)
23 Poor dwelling going for a song (6) SHANTY (Double Defn. - 1. Poor dwelling 2. song
25 Nag mother for the large wine bottle (6) MAGNUM (ana. NAG+MUM(mother))
28 About 51 use it maybe, yes, use it (7) UTILISE (ana. LI(51 in roman)+USE+IT)
29 Abstain from singing the chorus (7) REFRAIN (Double Defn. - 1. Abstain 2. singing the chorus)
30 Selected upper class (5) ELITE (Direct)
31 It may be the chairman's task to fill in with padding and stuff (9) UPHOLSTER (Cryptic Defn. - chairman as in one who makes and upholsters chairs)

Down
1 Detains as substitute (7) INSTEAD (ana. DETAINS; 'as' an ana. indicator??)
2 Ready to wear an unmeasured wardrobe (3,3,3) OFF THE PEG (Direct)
3 Horizontal mounted projection from right nice company (7) CORNICE (ana. R(right)+NICE+CO(company))
4 51 were unaccompanied (4) LONE (51=LI=L+ONE)
5 Action taken to get pets (4) STEP (ana. PETS)
6 The man singing song of praise (6) ANTHEM (ana. THE+MAN)
7 A very long time (5) YEARS (Direct)
8 Extremely Cruel (7) SATANIC (Direct)
13 Sieze power wrongly from us (5) USURP (us=US, URP=??)
14 Dominant idea formed if Tom goes back (5) MOTIF (Tom goes back=MOT+IF)
17 Interminably sorry about the pen of my French aunt (9) REPENTANT (about=RE, pen=PEN, French aunt=TANT => RE+PEN+TANT)
18 Lure of bad government (7) MISRULE (ana. of Lure=RULE=>MISRULE=bad govt; a bad clue as well)
20 Frolicsome like kittens (7) PLAYFUL (Direct)
21 Partly ran to attend the meeting (7) SEMINAR (Partly=SEMI, ran to attend=ana. RAN=NAR => SEMI+NAR; 'to attend' an ana. indicator??)
22 Seems to be very hard work on the street (6) STRIFE (??)
24 An excuse for the accused (5) ALIBI (Direct)
26 Be authorised to find a suitor (4) BEAU (Be=BE, authorised=AU => BE+AU)
27 Consummate expert (4) ARCH (Direct)