Sheep cries about what pig becomes in the islands (7)
I believe the answer is:
bahamas
'islands' is the definition.
(I've seen this before)
'sheep cries about what pig becomes' is the wordplay.
'sheep cries' becomes 'baas'.
'about' is an insertion indicator.
'what pig becomes' becomes 'ham'.
'baas' going around 'ham' is 'BAHAMAS'.
'in the' is the link.
(Other definitions for bahamas that I've seen before include "Islands near Florida" , "WI island group" , "holiday destination" , "Atlantic islands" , "Have a bash, Ma, on the islands" .)