One goes over these card game rules, finally (7)
I believe the answer is:
bridges
'one goes' is the definition.
The definition and answer can be both acts as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'these card game rules finally' is the wordplay.
'these card game' becomes 'bridge' (bridge is a kind of card game).
'finally' indicates one should take the final letters.
The final letter of 'rules' is 's'.
'bridge'+'s'='BRIDGES'
'over' is the link.
Can you help me to learn more?
(Other definitions for bridges that I've seen before include "Robert -, poet laureate" , "Big reds (anag.)" , "One responsible for lyrics" , "WRITER" , "Spans" .)