6 Stamps for mailing (7)
7 Spells (5)
9 Box (4)
10 Pessimism (10)
11 Forked (8)
13 Secret (6)
15 Prefix indicating "Equal" (4)
17 Spasm (5)
18 Touch with the tongue (4)
19 Dicker (6)
20 Almost not (8)
23 In a roundabout way (10)
26 Streetcar (4)
27 An online directory (5)
28 Drop a hint (7)
Down
1 Alienating (10)
2 Set off a rocket (6)
3 Floating mass of ice (4)
4 A frothy wave (8)
5 Seventy-five in Roman numerals (4)
6 One who plays the bagpipes (5)
8 Exposing folly to ridicule (7)
12 Bargains (5)
14 Speeds (10)
16 A degree of excellence (7)
17 Someone who is owed (8)
21 Delegate (6)
22 Jumped (5)
24 Type of salmon (4)
25 Overthrow (4)