Allure in good Latin love affair (7)
I believe the answer is:
glamour
'allure' is the definition.
(thesaurus)
'good latin love affair' is the wordplay.
'good' becomes 'g' (abbreviation).
'latin' becomes 'l'.
'love affair' becomes 'amour' (I've seen this before).
'g'+'l'+'amour'='GLAMOUR'
'in' acts as a link.
(Other definitions for glamour that I've seen before include "sophisticated style" , "Fascinating beauty" , "Alluring beauty or charm" , "Appealing and beautiful quality" , "Charm and allure" .)