Glowing fire remnants (6)
I believe the answer is:
embers
'glowing fire remnants' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for embers that I've seen before include "Hot fragments of wood or coal" , "Dying coals in fire" , "Ashes" , "Dying residue of a fire" , "Glowing coals" .)