Brother may have this nurse to fancy (7)
I believe the answer is:
tonsure
'brother may have' is the definition.
The answer and definition can be both related to bodily activities as well as being verbs in their base form.
Perhaps you can see a link between them that I can't see?
'nurse to fancy' is the wordplay.
'fancy' indicates anagramming the letters.
'nurse'+'to'='nurseto'
'nurseto' with letters rearranged gives 'TONSURE'.
'this' is the link.
Can you help me to learn more?
(Other definitions for tonsure that I've seen before include "Shaven part of monk's head" , "Shaven area on monk's head" , "Close-shaved hairstyle" , "Monastic haircut" , "Haircut for a monk" .)