The woman is frantic the morning after! (5)
I believe the answer is:
madam
'the woman' is the definition.
(used to address a woman)
'frantic the morning after' is the wordplay.
'frantic' becomes 'mad' (synonyms).
'the morning' becomes 'am' (as in 12:00 AM).
'after' says to put letters next to each other.
'mad'+'am'='MADAM'
'is' acts as a link.
(Other definitions for madam that I've seen before include "precocious schoolgirl?" , "Term of address to a woman" , "Make wildly happy" , "Woman with status - girl with bad manners" , "Courteous form of address to a woman" .)