Mischief from one dancing with Yankees outside game (13)

'mischief from one' is the definition.
The definition suggests a singular noun which matches the answer.

'dancing with yankees outside game' is the wordplay.
I cannot really see how this works, but
'dancing' could be 'jig' (jig is a kind of dancing) and 'jig' is present in the answer.
'game' could be 'poker' (poker game is a kind of game) and 'poker' is located in the answer.
'yankees' could be 'yy' (two Y's - Yankee is Y in the phonetic alphabet) and 'yy' is located in the leftover letters.
The remaining letters 'ger' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?