Strange game of cards (5)
I believe the answer is:
rummy
This clue is a double definition.
'strange' is the first definition.
(similar in meaning)
'game of cards' is the second definition.
(I've seen this before)
(Other definitions for rummy that I've seen before include "Two-pack card game" , "with an alcoholic taste?" , "Gin perhaps?" , "Odd; card-game" , "Card game; strange; like a spirit" .)