Seen with grooms and servant who's made to wear formal dress (10)
I believe the answer is:
bridesmaid
'wear formal dress' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'seen with grooms and servant who's made' is the wordplay.
I cannot quite understand how this works, but
'servant' could be 'maid' (maid is a type of servant) and 'maid' is present in the answer.
The remaining letters 'brides' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Other definitions for bridesmaid that I've seen before include "match participant" , "Attendant at wedding" , "one's holding up train perhaps" .)