What the punter did with twice the amount of duplicity? (7,2)
I believe the answer is:
doubled up
'what the punter did' is the definition.
I can't judge whether this definition defines the answer.
'with twice the amount of duplicity?' is the wordplay.
'with' is a charade indicator (letters next to each other).
'twice the amount' becomes 'double' (I've seen this before).
'of duplicity?' becomes 'dup' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'double' put next to 'dup' is 'DOUBLED UP'.
Can you help me to learn more?
(Another definition for doubled up that I've seen is " Bent in two".)