Swine's confines (3)
I believe the answer is:
sty
'swine's confines' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sty that I've seen before include "Swinish place" , "Pig's enclosure" , "Pig house" , "Pigpen; swelling" , "Pig pen" .)