In Whitsun I tearfully wed (5)
I believe the answer is:
unite
'wed' is the definition.
(I've seen this in another clue)
'in whitsun i tearfully' is the wordplay.
'in' indicates a hidden word.
'UNITE' is hidden in the letters of 'whitsun i tearfully'.
(Other definitions for unite that I've seen before include "Couple" , "Join together, become allies" , "Put together" , "ally" , "old coin" .)