Cigar remnants (3)
I believe the answer is:
ash
'cigar remnants' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ash that I've seen before include "It's used for flooring" , "Tree with silver-grey bark" , "Remnant from fire" , "What's often left after something 1 Ac" , "Tree; fire residue" .)