Free of bride (3)
I believe the answer is:
rid
'free' is the definition.
(to be free of something is to be rid of it)
'of bride' is the wordplay.
'of' indicates the answer is hidden within the clue.
'RID' can be found hidden inside 'bride'.
(Other definitions for rid that I've seen before include "Free (someone of something unwanted)" , "Free (person of affliction)" , "Disabuse" , "Free, disencumber" , "Free, relieve" .)