Bonfire remains (5)
I believe the answer is:
ashes
'bonfire remains' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ashes that I've seen before include "International competition" , "Test-match trophy" , "Cricketing trophy - remains" , "Remains of the Yule logs?" , "Residue form fires" .)