Polite form of address to a woman (5)
I believe the answer is:
madam
'polite form of address to a woman' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for madam that I've seen before include "Stuck-up girl" , "How one may address a woman" , "Titled lady" , "Woman with status - girl with bad manners" , "Make wildly happy" .)