Gauge a term that was used about me (7)
I believe the answer is:
ammeter
'gauge a term that was used about me' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'term that was used about me' is the wordplay.
I cannot quite see how this works, but
'about' could be 'a' (abbreviation in Chambers) and 'a' is found within the answer.
'me' is found in the answer.
an anagram of 'term' is 'mter' which is present in the left over letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for ammeter that I've seen before include "Current-measuring instrument" , "Device that measures the flow of electrical current" , "Electric current measurer" , "Device measuring electric current" , "Current-measurer" .)