Whistle for pet to visit (7)
I believe the answer is:
catcall
'whistle' is the definition.
(type of whistling noise)
'pet to visit' is the wordplay.
'pet' becomes 'cat' (cats are often kept as pets).
'to visit' becomes 'call' ('call' can be a synonym of 'visit').
'cat'+'call'='CATCALL'
'for' is the link.
(Other definitions for catcall that I've seen before include "Mocking remark" , "disapproving expression" , "Jeer" , "Feline whistle of disapproval" , "Derisive call" .)