Crossword Genius

Change gold fitting (7)

Ross

I believe the answer is:

adaptor

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'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" .)

I've seen this clue in the Sydney Morning Herald.
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