Possibly bearded lady's outfit for audition? (7)
I believe the answer is:
'possibly bearded' is the definition.
(hirsute means very hairy)
I don't understand how the rest of the clue works.
(Other definitions for hirsute that I've seen before include "Bearded" , "covered in hairs" , "Unshaven" , "Furry" , "Hairy and shaggy" .)