Keane's abandoned agreement, having thrown one on the double (5,4)

I believe the answer is:

snake eyes

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'having thrown one on the double' is the definition.
I can't tell whether this defines the answer.

'keane's abandoned agreement' is the wordplay.
'abandoned' is an anagram indicator (the original order is abandoned).
'agreement' becomes 'yes' (saying yes to something).
'keanes' anagrammed gives 'snakee'.
'snakee'+'yes'='SNAKE EYES'

Can you help me to learn more?

(Another definition for snake eyes that I've seen is " two in game".)

I've seen this clue in The Irish Times.

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