Solutions

ACROSS
1 Cowper.
C+OWPER (power anag.)
5 Mothball.
MOTH+BALL
9 Dependence.
D+EP+END+EN+CE
10 Rand.
RAN+D
11 Veronese.
VER(O+N+E)SE
12 Toy boy.
TOY+BOY
13 Aspen.
(two meanings)
15 Falsified.
(anag.)
18 Pastorale.
PAST+ORAL+E
19 Woden.
W+ODE+N
21 Demons.
(hidden)
23 Ruthless.
(anag.)
25 Nina.
N+IN+A
26 Rolling-pin.
ROLLING+PIN
27 Delivery.
DELI+VER+Y (lied anag. & rev rev.)
28 Esteem.
E+S+TEEM (team hom.)


DOWN
2 Obese.
O+BESE (bees anag.)
3 Prepotentb.
PRE+POT+ENT (rep & ten anag.)
4 Redeem.
(two meanings)
5 Monte Carlo Rally.
(anag.)
6 Treatise.
T+RE+A+TISE (site anag.)
7 Barmy.
B+ARMY
8 London Eye.
LONDON+EYE
14 Spare time.
SPARE+TIME
16 Footlight.
(straight cryptic)
17 Preserve.
P+RESERVE
20 Strike.
(two meanings)
22 Okapi.
OK+AP+I (pa rev.)
24 Swine.
S+WIN+E