Dress up, as you might say -- a requirement before the wedding? (6)
I believe the answer is:
prenup
'you might say a requirement before the wedding?' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'dress up' is the wordplay.
'dress' becomes 'pren' (I can't justify this - if you can you should give a lot more credence to this answer).
'pren'+'up'='PRENUP'
'as' acts as a link.
Can you help me to learn more?
(Other definitions for prenup that I've seen before include "Contract between those about to marry" , "arrangement before marriage" , "Contract before marriage, in short" , "Agreement drawn up before the wedding" , "Financial agreement in case of divorce made by a couple before marriage (abbr)" .)