5 across. No doubt UFO’s (anag) – off limits. 3-2-6 letters.
7 across. Pavement edge. 4 letters.
8 across. Proper, legitimate. 8 letters.
9 across. Publisher’s brand. 7 letters.
11 across. Go bad. 5 letters.
13 across. Surge (of activity). 5 letters.
14 across. Increased in size. 7 letters.
16 across. Toxic gas, Cl. 8 letters.
17 across. Cross in church. 4 letters.
18 across. Critical reaction? 11 letters.