.... and so the year ends with an excellent CW, in my opinion, with some good anagrams.
ACROSS
1 Standard names used for cheese (8) PARMESAN {PAR}{NAMES*}
5 Live in a state of unconsciousness with not a bit of cognisance.
Looking back, it’s a bug’s life (6) AMOEBA {AMOc}{EB}{A}<=
9 Reason City’s (odd) steeped in holiness (8) SANCTITY {SAN{CiTy}ITY}
12 Essential to one even in India, a great developing country
(9) ARGENTINA {oNe+iNdIa+A+GREAT}*
13 Live happily (2,3) ON AIR [DD]
16 Kudos! You finally cracked the puzzle (6) SUDOKU {KUDOS+yoU}*
18 Nickel available in large quantity in Germany (6) MUNICH {MU{NI}CH}
20 Short European female servant (4) SERF {SERb}{F}
23 Chief eastern state (5) MAINE {MAIN}{E}
27 Desire a new t-shirt (6) THIRST*
28 Fresh Lay’s chip? For real? (8) PHYSICAL*
29 Farm animals let out after onset of anthrax (in Connecticut)
(6) CATTLE {C{A}T}{LET*}
30 Sad and idle for a long time (4,4) BLUE MOON {BLUE} {MOON}
DOWN
1 Ingredient of a soup — a staple dish (5) PASTA [T]
2 Welsh green energy perhaps (6) RENEGE {GREEN+E}*
4 How to sit on a horse in one step? (7) ASTRIDE {A}{STRIDE}
6 It arrives through post from Lima? Strange system (4,5) MAIL ORDER {LIMA*} {ORDER}
7 Flags are flying — standards followed (8) EARMARKS {ARE*}{MARKS}
8 Maintain a raised hairstyle (6) ASSERT {A}{SSERT<=}
11 Missus gobbling a candy bar (4) MARS {M{A}RS}
15 Widespread in Terrible Ivan’s rule (9) UNIVERSAL*
17 Dog I categorise as a fighter (8) PUGILIST {PUG}{I}{LIST}
19 Poor writer (4) HACK [DD]
20 Case of Ron’s disappearance in Charleston — intriguing (7) SATCHEL CHArLESTon*
22 Maniac chops yank’s head off (6) PSYCHO {CHOPS+Y}*
25 Fabric from wool is legendary (5) LISLE [T]
26 Girl comes up short running a boutique (5) SALON {sSAL<=}{ON}