No 11897, Friday 06 Jan 2017, Incognito

This tribute has come a bit early :-) 

ACROSS
7   Harry, a person from the NorthEast (4) NAGA {NAG}{A}
8   The last run one requires to get a score a week after the thirteenth (9) TWENTIETH I got as far as 13+7=20
10 State: "Punch after punch endlessly without a trace of compassion” (6) PUNJAB {PUNch}{JAB}
11 Some soldiers install cooling device model in Indian railway (8) INFANTRY {IN}{FAN}{T}{RY}
12 Monster may reform and give me a chair (8) CHIMAERA*
14 At home, with auditor's money? That's natural (6) INBRED {IN}{BRED}(~bread)
16 Bloodbath resulting from vehicle hitting old horse with energy (7) CARNAGE {CAR}{NAG}{E}
18 Urge deviant NGOs to make drinks (7) EGGNOGS {EGG}{NGOS}*
21 Tree planted around National Defence Academy gives perfumed wood (6) SANDAL {SA{NDA}L}
23 Mailed weapon in front of our editor (8) ARMOURED {ARMOUR}{ED}
25 Groggy metaphysician discards ripped panty material resulting in circulation problem (8) ISCHEMIA MEtapHySICIAn*
27 People from Jammu area hound gunners (6) DOGRAS {DOG}{RA'S}
29 University chairman travelled around part of China (9) MANCHURIA {U+CHAIRMAN}*
30 Old weapons like X and Y, may be (4) AXES [DD]

DOWN
1   Graduate takes public transport to Hong Kong wearing a scarf (8) BABUSHKA {B{A}{BUS}{HK}A}
2   Pilgrimage had a desert journey, for starters (4) HADJ Acrostic
3   Building to house 9 is not rickety (6) STABLE [DD]
4   Last month Indian Military Academy student got this point, perhaps (7) DECIMAL {DEC}{IMA}L}
5   Tough, I hear, to serenade around, eating gluttonously (8) STUFFING (~tough){TUFF} in {SING}
6   Control for 9 during precipitation, I hear (4) REIN (~rain)
9   20 may ride this animal (5) HORSE Definition by example
13 Placed explosive in the ground or removed from the ground? (5) MINED [DD]
15 Some Africans admit soldier to Bangalore University at first (5) BANTU {B{ANT}U}
17 Girl hums around lead player and moves noisily (8) GALUMPHS {GAL}{UM{Pl...r}HS*}
19 South East garden renovation brought forth pineapples (8) GRENADES {SE+GARDEN}*
20 Mounted soldiers from Virginia (in California) get royal salary at last (7) CAVALRY {CA{VA}L}{R}{s...rY}
22 “A sort of tea for a son, Field Marshal Manekshaw” (5) ASSAM {A}{S}{SAM}
24 Mother, a place in Kargil or Chennai? (6) MADRAS {MA}{DRAS}
26 Army man who led first successful Everest expedition may be found in Phuntsholing (4) HUNT [T]
28 Plane gun covers nacelle at first (4) GNAT {GAT} over {Na...e}

GRID