Duplicates game (7)
I believe the answer is:
doubles
I believe this clue is a double definition.
'duplicates' is the first definition.
('double' can be a synonym of 'duplicate')
'game' is the second definition.
(doubles is a kind of game)
(Other definitions for doubles that I've seen before include "sort of game" , "Made twice as much" , "Tennis match for four players" , "Like Carton and Darnay" , "match in court" .)