City of Gold is at an angle (7)
I believe the answer is:
orleans
'city' is the definition.
(I've seen this before)
'gold is at an angle' is the wordplay.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'is at an angle' becomes 'leans' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'or'+'leans'='ORLEANS'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for orleans that I've seen before include "historic French city" , "French city saved by Joan of Arc" , "Fabric" , "material" , "Joan of Arc was known as the Maid of . . . . . . ." .)