Feline pet (3)
I believe the answer is:
cat
'feline pet' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cat that I've seen before include "An old whip with nine tails" , "Feline mammel" , "A tom" , "Grimalkin" , "Sailor's whip with nine knotted strands" .)