Span of card game (6)
I believe the answer is:
bridge
This clue is a double definition.
'span' is the first definition.
(I know that span can be written as bridge)
'card game' is the second definition.
(I know that bridge is a type of trick-taking game)
'of' is the link.
(Other definitions for bridge that I've seen before include "Bony upper part of nose; card game" , "Structure spanning a divide" , "may involve suspension" , "A walkover" , "Connection crossing river etc" .)