Spacious with an accent (5)
I believe the answer is:
broad
I believe this clue is a double definition.
'spacious' is the first definition.
(I know that spacious can be written as broad)
'an accent' is the second definition.
(thesaurus)
'with' acts as a link.
(Other definitions for broad that I've seen before include "Board (anag.)" , "Open" , "Spacious - tolerant" , "East Anglian waterway" , "Without detail; wide" .)