Edited the exams to cover historic card game (5,4,2)

I believe the answer is:

texas hold em

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'card game' is the definition.
'texas hold em' can be an answer for 'game' (I have seen 'game of poker' mean 'texas hold em' so perhaps 'game' could also mean 'texas hold em'). I'm not sure about the 'card' bit.

'edited the exams to cover historic' is the wordplay.
'edited' indicates anagramming the letters.
'to cover' indicates putting letters inside.
'historic' becomes 'old' (historic can mean very old).
'the'+'exams'='theexams'
'theexams' anagrammed gives 'texashem'.
'texashem' placed around 'old' is 'TEXAS HOLD EM'.

Can you help me to learn more?

(Other definitions for texas hold em that I've seen before include "Variety of poker" , "game of poker" .)

I've seen this clue in The Times.

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