Local barman banning second old queen (6)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

TAVERN [er] (barman: I’ll comment on that in a minute) without the second ER (abbreviation for the late Queen Elizabeth Regina ). The “barman” might be literally the manager of a drinking establishment, but that would be a bit weak because it uses the same meaning as the definition. Or it might be the Renaissance composer (writer of musical bars) John Taverner, though he’s perhaps not well-known enough to count as general knowledge; in any case I’ll be pedantic and point out that music in his day was generally written without bar-lines. Not to be confused with the 20th-century composer John Tavener, who used a different spelling. Local = slang for a pub = tavern.