Meet nitpicking accountant British and American separately ignored (9)

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

A subtraction: [b]E[a]N COUNTER (‘nitpicking accountant’) minus the B and A (‘ B ritish and A merican separately ignored’). The first four clues I solved have all been subtractions; I take it that that will not continue!.