Catcall (4)
I believe the answer is:
hoot
'catcall' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hoot that I've seen before include "Honk - laugh" , "Owlish cry" , "scream" , "Raucous cry" , "Warning sound - something not given by the careless!" .)