Bit of kindling (4)
I believe the answer is:
twig
'bit of kindling' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for twig that I've seen before include "Suddenly see; branchlet" , "A small branch - cop on?" , "Latch on" , "A little stick" , "Small part of a branch - suddenly understand" .)