Put up a fuss (6)
I believe the answer is:
squawk
'put up a fuss' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for squawk that I've seen before include "Loud harsh cry, as from cat if someone steps on its tail" , "Harsh sound of bird" , "Parrot's noise" , "Bird's harsh cry" , "A harsh loud cry as when one steps on cat's tail" .)