Go over role of female at wedding holding key (6)
I believe the answer is:
bridge
'go over' is the definition.
(thesaurus)
'role of female at wedding holding key' is the wordplay.
'role of female at wedding' becomes 'bride' (I can't explain this - if you can you should believe this answer much more).
'holding' is an insertion indicator.
'key' becomes 'g' (musical key).
'bride' placed around 'g' is 'BRIDGE'.
Can you help me to learn more?
(Other definitions for bridge that I've seen before include "Card game; structure" , "''Like a ... over troubled water'' (Simon and Garfunkel)" , "link" , "Span, connecting structure" , "Crossing point" .)