Game that could cause a flare-up? (5)

I believe the answer is:

poker

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'game' is the definition.
(poker is a kind of game)

I cannot understand how the rest of the clue works.

(Other definitions for poker that I've seen before include "Stiff rod; card game" , "See 1" , "A game for the fireplace implement" , "Fire prod; game" , "Popular gambling game with much bluffing" .)

I've seen this clue in the Evening Standard.

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