Clue: Barman and former drinkers right about police state? (5,7)
Answer: AARON COPLAND
Explanation: Barman and former drinkers right about police state? (5,7)
**AA** (Alcoholics Anonymous, so "former drinkers") + **R** (right) + **ON** ("about") + **COP** ("police") + **LAND** ("state") 
*In this clue, the "bar" in "barman" relates to musical bars, and Aaron Copland (1900-1990) was an American composer.