Game to catch married woman cuddling German (8,6)
I believe the answer is:
contract bridge
'game' is the definition.
(contract bridge is a card game)
'catch married woman cuddling german' is the wordplay.
'catch' becomes 'contract' (to catch an illness is to contract it).
'married woman' becomes 'bride' (woman getting married).
'cuddling' is an insertion indicator (inserted letters are cuddled or held).
'german' becomes 'g' (abbreviation).
'bride' placed around 'g' is 'bridge'.
'contract'+'bridge'='CONTRACT BRIDGE'
'to' acts as a link.
(Other definitions for contract bridge that I've seen before include "that requires two pairs of hands" , "Card game" , "Wherein four deck hands" , "Quartet play this" , "Instruction for nose job, perhaps" .)