Lure English representative into heart of Brittany (5)
I believe the answer is:
tempt
'lure' is the definition.
(synonyms)
'english representative into heart of brittany' is the wordplay.
'english' becomes 'e' (abbreviation).
'representative' becomes 'mp' (Member of Parliament, a representative).
'into' is an insertion indicator.
'heart of' means to look at the middle letters.
The middle letters of 'brittany' are 'tt'.
'e'+'mp'='emp'
'emp' going inside 'tt' is 'TEMPT'.
(Other definitions for tempt that I've seen before include "Entice - give rise to desire" , "Entice - dare" , "Whet the appetite" , "Invite" , "Allure, entice" .)