Covered with hair (5)
'covered with hair' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hirsute that I've seen before include "covered in hairs" , "Hairy and shaggy" , "Bearded" , "Covered with hair" , "Furry" .)
(Other definitions for furry that I've seen before include "Hairy" , "Hair-covered" .)