ACROSS
1 Obama swallows pill, becomes shape-shifter (6)
4 May be found when opening your inbox, or an extra can (4, 4)
9 Cowboy’s clauses (6)
10 Legless GI begs apple, providing topic of discussion hereabouts (8)
12 & 7dn Musician discovered in inner Los Angeles pile-up (8, 5)
13 PM’s exposure of this led to composition of famous 26dn (6)
15 10ac heard in Camptown (4)
16 Soothing sounds produced by renowned hedgehog ointment (5, 5)
19 Eek! Go spare about posh musical obsessives (5, 5)
20 Pipemaker Nathaniel briefly confused in Sicily (4)
23 Great Eastern rams provide new outfits (6)
25 Figuratively revealed by Dunlevie (8)
27 Meaner, could also be more piquant (8)
28 Broken EBow in empty cab could be death-trap (6)
29 Enlist accomplice, obviously (8)
30 Shot by bletherer (6)

DOWN
1 Stranded a bass? (7)
2 Uneven polish may be strange guarantee (3, 6)
3 Red rob returns 10ac species (6)
5 Wee bay reputedly vacated by piper in a huff (4)
6 Confused petrol salespersons provide stimulant (8)
7 see 12ac
8, 22 Meted out curse, disturbed aristocratic 10ac (7, 2, 4)
11 For appreciative responses look to strengthen core skills (7)
14 see 17dn
17, 14, 24 Favoured tune of mad King Hwei? Wilting Nettle! (6, 3, 7, 5)
18 Zap mango; reassemble as 10ac species (8)
19 Peak experiences possibly engendered by Geordie Syme’s Paircel o Tunes, initially (8)
21 Chopped budleia within earshot (7)
22 see 8dn
24 see 17dn
26 Dance sounds authentic (4)

BLETHERSKITE