Eat audibly (5)
I believe the answer is:
munch
'eat audibly' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for munch that I've seen before include "Chew steadily - "Scream" artist" , "Chew; Norwegian artist" , "Norwegian painter" , "champ" , "Eat noisily" .)