Express to curb type of shower (6)
I believe the answer is:
bridal
'type of shower' is the definition.
(I've seen this in another clue)
'express to curb' is the wordplay.
'express' shows a homophone (sound like) (I've seen 'expressed' mean this).
'to curb' becomes 'bridle' (synonyms).
'bridle' is a homophone of 'BRIDAL'.
(Other definitions for bridal that I've seen before include "Newly-wed" , "Relating to the woman getting married" , "of marriage" , "To do with wedding - perhaps a suite" , "The suite for the honeymooners" .)