Change gold fitting (7)
I believe the answer is:
adaptor
'fitting' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'change gold' is the wordplay.
'change' becomes 'adapt' (adapting is a kind of changing).
'gold' becomes 'or' ('or' is the heraldic name for gold).
'adapt'+'or'='ADAPTOR'
Can you help me to learn more?
(Other definitions for adaptor that I've seen before include "Electrical device" , "Connector (O, not E)" , "Electrical connector" , "Connector for differing plug types" , "Electrical convertor" .)