Feel kind about deer (3)
I believe the answer is:
elk
'deer' is the definition.
(type of deer)
'feel kind about' is the wordplay.
'about' says the answer is hidden in the clue (the clue goes around or about the answer).
'ELK' is hidden in the letters of 'feel kind'.
(Other definitions for elk that I've seen before include "Big deer" , "Large northern deer" , "Moose-like deer" , "Large ruminant" , "Big beast" .)