Rummy variation (7)
I believe the answer is:
canasta
'rummy variation' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for canasta that I've seen before include "this needs two packs" , "series of hands" , "Card game like rummy" , "Card game resembling rummy" , "Two-pack card game" .)