Left-winger returning with English cake (5)
I believe the answer is:
torte
'cake' is the definition.
(torte is a kind of cake)
'left-winger returning with english' is the wordplay.
'left-winger' becomes 'trot' (I've seen this before).
'returning' shows that the letters should be reversed in order.
'with' means one lot of letters go next to another.
'english' becomes 'e' (abbreviation).
'trot' backwards is 'tort'.
'tort'+'e'='TORTE'
(Other definitions for torte that I've seen before include "Sweet cake or tart" , "Rich (Austrian) cake or pastry" , "Rich sweet cake" , "Rich food" , "1d [PASTRY]" .)