In more need of sunshine, doctor in seaside city (7)
I believe the answer is:
palermo
'seaside city' is the definition.
(city on the Italian coast)
'in more need of sunshine doctor' is the wordplay.
'in more need of sunshine' becomes 'paler' (someone pale may be in need of a sun tan).
'doctor' becomes 'mo' (medical officer).
'paler'+'mo'='PALERMO'
'in' acts as a link.
(Other definitions for palermo that I've seen before include "Sicilian port" , "ity of Italy" , "Chief port of Sicily" , "Main city of Sicily" , "Italian capital" .)