Crossword Genius

Mind game? (7)

Ross

I believe the answer is:

marbles

I believe this is a double definition.

'mind' is the first definition.
(I've seen this before)

'game?' is the second definition.
(marbles is a kind of game)

(Other definitions for marbles that I've seen before include "You'll be mad if you lose them" , "Glass balls to play with" , "Small spheres of glass - statuary" , "Mind" , "alleys, perhaps" .)

I've seen this clue in The Telegraph.
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