Learner driver breaking a rule formulated appeal (6)
I believe the answer is:
allure
'appeal' is the definition.
(thesaurus)
'learner driver breaking a rule formulated' is the wordplay.
'learner driver' becomes 'l' (I've seen this in other clues).
'breaking' indicates putting letters inside.
'formulated' indicates anagramming the letters.
'a'+'rule'='arule'
'arule' is an anagram of 'alure'.
'l' going into 'alure' is 'ALLURE'.
(Other definitions for allure that I've seen before include "Powerful fascination" , "Powerful attraction" , "There's glamour" , "Glamorous appeal" , "Seduce" .)