Saw wood (5)
I believe the answer is:
snore
'saw wood' is the definition.
(I know that saw wood can be written as snore)
This is all the clue.
(Other definitions for snore that I've seen before include "Make raucous nasal sound during sleep" , "Make racous nocturnal sound" , "6 made by sleeper" , "Raucous sound while sleeping" , "thing which bores" .)