Crossword Puzzle Back again?

Clue: Back again?

One who'll stab you in the back (RAT with 3 letters)
''Back to you'' in radiospeak (OVER with 4 letters)
Play to the back row (EMOTE with 5 letters)
Backers for plasterwork (LATHS with 5 letters)
Tried to get back at (SUED with 4 letters)
Borrower's backup (COSIGNER with 8 letters)
Religious folks who like to toss ideas back and forth? (FRISBEETERIANS with 14 letters)
Puts back in (e.g. REELECTS with 8 letters)
Container for the back pocket (FLASK with 5 letters)
Elevator background (MUZAK with 5 letters)