Wayward English worker steals expensive car (6)
I believe the answer is:
errant
'wayward' is the definition.
(I've seen this before)
'english worker steals expensive car' is the wordplay.
'english' becomes 'e' (abbreviation).
'worker' becomes 'ant' (worker is a type of ant).
'steals' is an insertion indicator.
'expensive car' becomes 'rr' (abbreviation for Rolls Royce).
'e'+'ant'='eant'
'eant' enclosing 'rr' is 'ERRANT'.
(Other definitions for errant that I've seen before include "Quixotic" , "heretical?" , "looking for adventure" , "Straying from the right course" , "Sinful" .)