Riddle deployed in game (6)

I believe the answer is:

enigma

'riddle' is the definition.
(I know that riddle can be written as enigma)

'deployed in game' is the wordplay.
'deployed' indicates anagramming the letters.
'in'+'game'='ingame'
'ingame' with letters rearranged gives 'ENIGMA'.

(Other definitions for enigma that I've seen before include "cryptic puzzle!" , "It's mysterious like gamine" , "WWII cipher" , "Elgar Variations nickname" , "Coding device" .)

I've seen this clue in The Times.

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