Bark shrilly (3)
I believe the answer is:
yap
'bark shrilly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for yap that I've seen before include "gossip -" , "Shrill bark; rhymes with chart" , "Natter; small dog's bark" , "Yelp" , "Shrill bark; wage reversed" .)