Campfire leftovers (5)
I believe the answer is:
ashes
'campfire leftovers' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ashes that I've seen before include "Eng/Aus test series" , "Residue form fires" , "Burnt residue" , "Embers" , "Test cricket series" .)