Novel left somewhere in Wales (7)
I believe the answer is:
newport
'somewhere in wales' is the definition.
(I know that Newport is in Wales)
'novel left' is the wordplay.
'novel' becomes 'new' (novel means new or fresh).
'left' becomes 'port' (left side of a ship - opposite of starboard).
'new'+'port'='NEWPORT'
(Other definitions for newport that I've seen before include "harbour town" , "Welsh city on the Usk" , "City of southeast Wales" , "Major IOW town" , "Welsh town" .)