Crossword Puzzle Cowards, Down Under

Clue: Cowards, Down Under

Understudy (STANDIN with 7 letters)
In underhanded fashion (SLYLY with 5 letters)
Run downfield for a pass (GOLONG with 6 letters)
Collected, as downed leaves (RAKED with 5 letters)
"I'm returning this room warmer-it makes my floor bend downward" (SAGHEATER with 9 letters)
Underwater forest plant (KELP with 4 letters)
Underlining equiv. (ITAL with 4 letters)
Downhill conveyance (SLED with 4 letters)
Did some undercover work (WOREAWIRE with 9 letters)
Underwear choice (e.g. BRIEFS with 6 letters)