Bar worker's rent cut by politician given latitude (7)
I believe the answer is:
templar
'bar worker's' is the definition.
(barrister within the Inner or Middle Temple)
'rent cut by politician given latitude' is the wordplay.
'rent' becomes 'tear' (synonyms).
'cut by' is an insertion indicator (some letters cut their way into a word).
'politician' becomes 'MP' (Member of Parliament).
'given' means one lot of letters go next to another.
'latitude' becomes 'L' (abbreviation for latitude).
'mp'+'l'='mpl'
'tear' going around 'mpl' is 'TEMPLAR'.
(Other definitions for templar that I've seen before include "barrister" , "Lawyer" , "Crusading" , "Knight of a religious and military order" , "Simon - (The Saint)" .)