Independent 8011 by Eimi

*=anag, []=dropped, <=reversed, hom=homophone, CD=cryptic def, DD=double def, sp=spoonerism

This was a slightly odd puzzle with lots of short words. There were lots of nice, inventive clues and I’m sure there must be a NINA or theme to it, but can’t see it. Some of the words and phrases are a little on the unusual side – I’m still struggling to locate 27 down or 9 in any dictionaries.
 

Across
1	Rocket: I think this is a DD referring to salad rocket.
4	Summer: REM mus[ic]<, 75% referring to the removal of 2 of the 8 characters. Reference to the music band REM, who broke up in 2011 and the recently deceased Donna Summer.
10	Interim: Inter (Milan) + I’m.
11	Locusts: Lost around cu + s(pecial).
12	Shore: Hom of Shaw, although I thought country for shore was a little odd.
13	Off season: Off + on around seas(=mains).
14	Green: DD, Martians being stereotypically little green men.
16	Watchers: Wat + Cher’s. A wat is apparently a Buddhist temple.
20	Settlers: L(eft) in setters.
22	Usher: US her[o], referring to the US singer.
25	Musicians: Mu + sic[il]ians.
27	Towns: [Presiden]t + owns(=has).
29	Martian: Mart + Ian. I hesitated over this one because Mart hardly seems common except, as you can see here, in Estonia.
30	Morning: Ming around [Lim]o[ges] + RN.
31	Silent: Tinsel*.
32	Bright: DD – I think it’s a reference to John Bright.
Down
1	Reims: Miser*.
2	Cathode: (The coda)*.
3	Eerie: Alternate letters of jewel raider.
5	Uncle: DD referring to uncle in his pawnbroker guise.
6	Must see: Muse around TSE. TSE seems to be variant of BSE.
7	Resin: RE + s[quare-bash] + in. I’m not keen on using initial letters of hyphenated words, however.
8	Ammon: A mm + on (=ahead).
9	Fly Flap: I think this is a DD of stylish(=fly) + swish(=flag) and a fly flap must be a type of swatter.
14	Gas: Hidden in Saratoga Springs.
15	Nil: Nil[e].
17	Cru: C[a]r + u, cru being something to do with wines (which I’m not really into).
18	Sir: Rev initial letters of Rider is satirised.
19	Ariadne: Aria + end<.
21	Testril: Litters*. Testril seems to be a word for a sixpence which was used in Shakespeare.
23	Hawking: DD (Stephen Hawking).
24	Osama: Hidden, rev in Alabama song.
25	Mimes: M(oney) + semi<.
26	Cairn: Air in C + S.
27	Tirer: R in tier.
28	Sight: DD.