1 Anagrams.....Underdog Grounded

2 Down in the dumps.....Crest Fallen

3 A casual photo.....Snaps Hot

4 Do this and kiss.....Purse Lips

5 A mentally unstable milliner from fiction.....Mad Hatter

6 A traditional caper.....Folk Dance

7 He works hard in the kitchen?.....Potato Peeler

8 It’s not healthy here.....Death Valley

9 Hitler's dream.....Master Race

10 Bacteria.....Salmon Ella

11 Remained inert, we hear.....Staid Still

12 American flowers.....Potomac Hudson

13 Both can be cast.....Doubt Shadow

14 A U.S. region.....Middle West

15 A financial street.....Thread Needle

16 Numbers.....Seven Morphine

17 They go with ‘plate’.....Armour Dinner

18 Sweet.....Pear Drop

19 Candid.....Out Spoken

20 A slip road in London?.....Petticoat Lane