Wild bird a student associated with a wedding (6)
I believe the answer is:
bridal
'a wedding' is the definition.
(bridal is a kind of wedding)
'wild bird a student' is the wordplay.
'wild' indicates anagramming the letters.
'student' becomes 'l' (as in L-plates for learner drivers).
'bird' anagrammed gives 'brid'.
'brid'+'a'+'l'='BRIDAL'
'associated with' acts as a link.
(Other definitions for bridal that I've seen before include "Woman in White" , "Relating to a newly married woman" , "Nuptial" , "Wedding's" , "Newly-wed" .)