Wood-eating insect (7)
I believe the answer is:
termite
'wood-eating insect' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for termite that I've seen before include "Six-footer" , "Nest-building insect" , "It lives on wood" , "Ant-like insect that feeds on wood" , "Whitish antlike insect" .)