Bloody awful performance: heads roll (3)
I believe the answer is:
bap
'roll' is the definition.
(I've seen this before)
'bloody awful performance heads' is the wordplay.
'heads' indicates taking the first letters.
The initial letters of 'bloody awful performance' is 'BAP'.
(Other definitions for bap that I've seen before include "Flattish bread roll" , "Big roll" , "Large soft bread roll" , "Large flat round roll" , "A soft flat bread roll" .)