Artist, one allegedly blind, in the capital (5)
I believe the answer is:
rabat
'capital' is the definition.
(capital of Morocco)
'artist one allegedly blind' is the wordplay.
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'one allegedly blind' becomes 'bat' ('as blind as a bat').
'ra'+'bat'='RABAT'
'in the' acts as a link.
(Other definitions for rabat that I've seen before include "Moroccan capital" , "N African city" , "capital city" , "Moroccan city" , "Capital of Morocco" .)