Woman’s address you see unchanged after looking up (5)
I believe the answer is:
madam
I believe this clue is a double definition.
'woman's address' is the first definition.
(respectful term of address for a woman)
'you see unchanged after looking up' is the second definition.
(Other definitions for madam that I've seen before include "'Call Me ---' (I. Berlin)" , "Polite form of address for a woman" , "formidable woman" , "Courteous form of address to a woman" , "Stuck-up girl" .)