Take it he’s a grouch (4)
I believe the answer is:
bear
This clue is a triple definition!
'take it' is the first definition.
(thesaurus)
'he's' is the second definition.
'a grouch' is the third definition.
(thesaurus)
(Other definitions for bear that I've seen before include "One's hairy" , "Carry - teddy" , "Pessimistic investor" , "Heavy carnivorous quadruped" , "Huge carnivore" .)