1 In gridiron football, offensive linemen (8)
5 Not in direct sunlight (6)
9 Bother (8)
10 Expels (6)
12 Nigerian monetary unit (5)
13 Proponents (9)
14 6 feet of water depth (6)
16 Copy (7)
19 Besmirched (7)
21 Muzzled (6)
23 English and French, for example (9)
25 Hitler's "master race" (5)
26 Winnie the Pooh's friend (6)
27 Ferociously (8)
28 Going steady (6)
29 Break the heart of (8)
Down
1 A yellow fruit (6)
2 Come into being (9)
3 An Australian "bear" (5)
4 Repossess (7)
6 Seizing control of a plane (9)
7 An old gold coin (5)
8 Calamity (8)
11 Seventeen in Roman numerals (4)
15 Of extreme difficulty (9)
17 Welder's fuel (9)
18 Marooned (8)
20 Excavates (4)
21 Slashing (7)
22 A biochemical catalyst (6)
24 Not daytime (5)
25 Icelandic monetary units (5)