Returns prenuptial agreement discreetly at party (4)
I believe the answer is:
gala
'party' is the definition.
(I know that party can be written as gala)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for gala that I've seen before include "Swimming competition" , "A show of charity" , "sporting event" , "Prod with the elbow" , "Sports meeting" .)