A male animal, one of four in pack (4)
I believe the answer is:
jack
'pack' is the definition.
(thesaurus)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for jack that I've seen before include "Raise" , "Something for raising < flag on board" , "Sailor - seen on the bowling green" , "Dog akin to 9" , "elevator?" .)