Not any, say, Sister (3)
I believe the answer is:
nun
'sister' is the definition.
(sister is a term of address for a nun)
'not any say' is the wordplay.
'not any' becomes 'none' (I've seen this before).
'say' shows a homophone (sound like).
'none' sounds like 'NUN'.
(Other definitions for nun that I've seen before include "Woman with a habit" , "She's made vows" , "Woman in Holy Orders" , "A palindromic holy woman" , "Member of religious order" .)