Solutions

ACROSS
1 Ample.
A+MP+LE
4 Seen.
(scene hom.)
7 Flag.
(two meanings)
10 Accurate.
AC+CURATE
11 At rest.
AT + REST (TA rev.)
12 Edge.
(two meanings)
13 Lethe.
LET+HE
14 Tram.
T+RAM
15 Imogen.
IM+O+GEN
17 In the way.
(anag.)
19 Catacomb.
C+A+TA+COMB
21 Surely.
SUR(E)LY
22 Dane.
D+AN+E
24 Idaho.
I+DAH+O
25 Sita.
SIT+A
26 Gazebo.
GA(Z+E)B+O
27 Khomeini.
K+HOME+IN+I
28 Mend.
MEN+D
29 Site.
S(IT)E
30 Seven.
SE(V)EN (ref. to 4a)