Major month for matrimony (4)
I believe the answer is:
june
'major month for matrimony' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for june that I've seen before include "Spring/summer month" , "Month named after Jupiter's wife" , "Month after 14" , "some time" , "Month of our summer solstice" .)