Tears accompanying this rueful exclamation? (5,4,2)
I believe the answer is:
thats torn it
'rueful exclamation?' is the definition.
(expression said in response to something bad)
I can't explain the remainder of the clue.
(Other definitions for thats torn it that I've seen before include "Now everything's ruined!" , "All plans are now spoilt!" , "Blast" , "Throw into jail" , "for God's sake!" .)