Card game score for Pierre – 11 (5,2,2)

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

VINGT (French word for twenty, also called “a score”; Pierre = a French man’s name), then ET UN (French for “and one”; 11 = reference to 11d PLUS ONE). Vingt et un = twenty-one = a name for card games where the aim is to make a hand scoring twenty-one points. The English name pontoon is said to be derived from a corrupted pronunciation of the French name.