Love in the morning associated with us? (5)
I believe the answer is:
amour
'love' is the definition.
('love' in French)
'morning associated with us?' is the wordplay.
'morning' becomes 'am'.
'associated with us?' becomes 'our' ('our' is the possessive pronoun for 'us').
'am'+'our'='AMOUR'
'in the' is the link.
(Other definitions for amour that I've seen before include "Love affair - loved one" , "Romantic affair" , "Loved one (French)" , "illicit liaison" , "Affaire" .)