Kind of red coat worn by clubber, periodically (6)

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

MAC (short for mackintosh = waterproof coat) around (worn by) alternate letters (periodically) of [c] L [u] B [b] E [r]. Red = short for red wine; Malbec is a dark purple grape variety or the red wine made from it.