Clue: Bar worker's rent cut by politician given latitude (7)
Answer: TEMPLAR
Explanation: Definition: Bar worker
 TEAR(a rent/a rip) ***contained in***(cut by) [ MP(abbrev. for a Member of Parliament, an elected politician) ***plus***(given) L(abbrev. for "latitude") ].
Defn:  Whimsically, …/a lawyer who has been called to the Bar and lives or has chambers in the Middle or Inner Temple in London.