Coffee Break Cryptic

29 April

Across

1 Phone teacher who may send in the clowns? (10)
7 Clergymen dance so awkwardly (7)
8 Tunes accompanied by graces? (4)
10 Hurry to see a marsh plant (4)
11 Grit held loosely - it brings traffic to a standstill (3,5)
13 He sits around producing a dissertation (6)
15 Heavy, uniteresting food - for example, little Dorothy's turnover (6)
17 Start to care about lack of prejudice (4,4)
18 Music from one of the Stones? (4)
21 School of note, in a way (4)
22 Girl seen on the moors (7)
23 Wash ferret, possibly, in this? (5,5)

Down

1 Raises backs (5)
2 Midday? No, almost one (4)
3 Light fog, by the sound of it, is left out (6)
4 Drunkards find room inside for vegetables (8)
5 Terribly angered! (7)
6 Reverence for commercial speech (9)
9 They run out of clothes (9)
12 Maid dons new suit (8)
14 One who votes for German prince? (7)
16 An Arab craft? Yes, certainly! (3,3)
19 Article on operating room? This is different (5)
20 Move quickly in river (4)