Snooze noisily (5)
I believe the answer is:
snore
'snooze noisily' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for snore that I've seen before include "Noise from a sleeper" , "Make raucous nocturnal noise" , "6 made by sleeper" , "Make noises sleeping" , "thing which bores" .)