Talk from the French priest about origin of temptation (7)
I believe the answer is:
lecture
'talk' is the definition.
(synonyms)
'the french priest about origin of temptation' is the wordplay.
'the french' becomes 'le' ('the' in French).
'priest' becomes 'cure' (I have seen 'Foreign priest' mean 'cure' so perhaps 'priest' could also mean 'cure').
'about' indicates putting letters inside.
'origin of' says to take the initial letters.
The initial letter of 'temptation' is 't'.
'cure' enclosing 't' is 'cture'.
'le'+'cture'='LECTURE'
'from' acts as a link.
(Other definitions for lecture that I've seen before include "Academic discourse" , "University lesson" , "Authoritative discourse" , "Instruct - admonish" , "Address" .)