1 down. Peg out. 5 letters.
2 down. Greek letter. 7 letters.
3 down. Pixar’s clownfish. 4 letters.
4 down. Item of bedroom furniture. 8 letters.
5 down. ___ grease. 5 letters.
6 down. Eg lime, mint and bottle. 6 letters.
11 down. Great beast. 8 letters.
12 down. Curtain, hair or fund. 6 letters.
13 down. Misbehaved. 5 letters and 2 letters.
15 down. Thick. 5 letters.
17 down. Meandered – laceration. 5 letters.
18 down. And others (Latin). 2 letters and 2 letters.