Notice what women often don't give in saying (5)
I believe the answer is:
adage
'saying' is the definition.
(adage is a kind of saying)
'notice what women often don't give' is the wordplay.
'notice' becomes 'ad' (both can mean an advertisement).
'what women often don't give' becomes 'age' (many women prefer not to give their age).
'ad'+'age'='ADAGE'
'in' acts as a link.
(Other definitions for adage that I've seen before include "Well-remembered proverb or saying" , "Saying, saw" , "Slogan" , "Maxim, aphorism" , "Wise old saying" .)