Groom partner to keep going finally in tricky game (6)
I believe the answer is:
bridge
'tricky game' is the definition.
(card game involving 'tricks')
'groom partner to keep going finally' is the wordplay.
'groom partner' becomes 'bride' (woman due to marry a groom).
'to keep' indicates putting letters inside.
'finally' says to take the final letters.
The final letter of 'going' is 'g'.
'bride' going around 'g' is 'BRIDGE'.
'in' is the link.
(Other definitions for bridge that I've seen before include "Structure spanning a divide" , "Span or connect" , "''Like a ... over troubled water'' (Simon and Garfunkel)" , "Card game involving North, South, East and West" , "Bony upper part of nose; card game" .)