A students club wedding (5)
I believe the answer is:
union
This could be a double definition.
'a students club' is the first definition.
'union' can be an answer for 'club' (workers' club). I am not sure about the 'a students' bit.
'wedding' is the second definition.
(I've seen this in another clue)
Can you help me to learn more?
(Other definitions for union that I've seen before include "political alliance" , "Jack may join when on the staff" , "Combination" , "Big old pearl" , "match" .)