Groom is writer hugging spectacular bride finally (5)
I believe the answer is:
preen
'groom' is the definition.
(thesaurus)
'writer hugging spectacular bride finally' is the wordplay.
'writer' becomes 'pen' (I've seen this before**).
'hugging' is an insertion indicator.
'finally' suggests the final letters.
The last letters of 'spectacular bride' are 're'.
'pen' enclosing 're' is 'PREEN'.
'is' is the link.
(Other definitions for preen that I've seen before include "to give himself a pat on the back" , "Groom with great care" , "Dress or smooth, feathers say" , "Titivate oneself" , "Vainly groom oneself" .)