Politician in delicatessen, a Tory (7)
I believe the answer is:
senator
'politician' is the definition.
(I know that senator is a type of legislator)
'in delicatessen a tory' is the wordplay.
'in' indicates a hidden word.
'SENATOR' is hidden within 'delicatessen a tory'.
(Other definitions for senator that I've seen before include "Member of the Second House" , "Member of upper US assembly" , "Member of the Upper House of the US Congress" , "US politician" , "Roman politician" .)