Outskirts of city restricting bright grey? (6)
I believe the answer is:
cloudy
'grey?' is the definition.
('cloudy' can be similar in meaning to 'grey')
'outskirts of city restricting bright' is the wordplay.
'outskirts of' suggests removing the centre (only letters on the outskirts).
'restricting' is an insertion indicator.
'bright' becomes 'loud' (I can't justify this - if you can you should believe this answer much more).
'city' with its middle removed is 'cy'.
'cy' enclosing 'loud' is 'CLOUDY'.
Can you help me to learn more?
(Other definitions for cloudy that I've seen before include "(Of a liquid) not clear" , "Obscure" , "It's unclear" , "'Overcast, nebulous (6)'" , "Not transparent" .)