Growl with bared teeth (5)
I believe the answer is:
snarl
'growl with bared teeth' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for snarl that I've seen before include "Tangle; growl" , "(Make an) aggressive noise" , "Bare teeth and growl" , "Say something aggressively" , "Growl aggressively" .)