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ACROSS
 1 One found within, riffling a Roget in spring (9)
 6 Dog behind post office in spring (3,2)
 9 Drunkard comes back to see drunkard (7)
10 Returning ocean drowns mythical bird in spring (7)
11 Animal preserve adopts adjustable rate (8)
12 Go for a spin around Egypt’s capital in spring (6)
14 Awfully pale in spring (4)
16 Lester is miscast in Disney movie directed by Oliver Stone (4,6)
19 Definitely strayed off track in past time (10)
20 Spring arrest (4)
22 Spring softly, with a little weight (6)
23 Nativism wrecked health needs (8)
26 Dialect in translation—that would be easy to defend (7)
27 Marine mammal shifting tail forward in spring (7)
28 Camps in the beginning of spring (March 15, say) (5)
29 Weather-beaten snakes shed tears (9)
DOWN
 1 Visually misconstrue a city poll (9)
 2 Spring exists to go to court (5)
 3 Assign uptime unfairly (6)
 4 The way spring arrives, relative to winter: faster, surprisingly, when keeping guard (10)
 5 Complex poetry incorporating public show (4)
 6 At first, painter Lichtenstein captures saucy quality (8)
 7 Obama is here, concealing birth certificate, perhaps (9)
 8 Priest’s wrinkled drape (5)
13 LA cop eying suspicious shooting target (4,6)
15 Like the first ruler of Israel, Turner attacked (9)
17 Truck in reverse breaks through the Met, missing the start for recording of The Hours (4,5)
18 Chooses to restrict leader of impious god-slayers (8)
21 Scalia drunk with French port (6)
22 Prepares for a trip to proclaim peace (5)
24 Silly goose! That’s how it ends (5)
25 Carnivorous 11 rises in spring (4)
 
ACROSS 1 D + ICE 3 CHA[i]R[I] TABLE 10 CAR NATION 12 anag.
13 L(A[m]Y)OVER 14 anag. (&lit.)
16 GO + A + LIE 18 & 11 pun 20 BAR RACKS 23 anag. 24 anag. 27 hidden
28 H(OLY W)ATER (yowl anag.)
29 D[riv]E + TESTABLE (seat belt anag.) 30 [c]ARGO

DOWN 1 anag. 2 CORN(C)OB (bronco anag.) 4 H(EIRLOO)M (oriole anag.) 5 R + ANKLE 6 “to buy for” 7 BED + EVIL 8 sorr[y] reels anag. 9 PA’S + T (&lit.) 14 VICE’S QUAD 15 AN(TIP)ODES (rev.) 17 PAR(ALL)EL (pearl anag.) 19 LAMB + [s]ENT 21 anag. 22 JOSH + UA (Au rev.) 25 G + OWN 26 hidden