Use of cane gets complaint (4)
I believe the answer is:
acne
'complaint' is the definition.
(acne is a kind of disease)
'use of cane' is the wordplay.
'use of' is an anagram indicator.
'cane' anagrammed gives 'ACNE'.
'gets' is the link.
(Other definitions for acne that I've seen before include "Pimply skin condition of adolescence" , "Inflammation of glands in skin" , "sort of disease" , "Teenage skin blemish" , "Facial spots" .)