Gauge greater vim to be false (10)
I believe the answer is:
gravimeter
'gauge' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'greater vim to be false' is the wordplay.
'to be false' indicates an anagram.
'greater'+'vim'='greatervim'
'greatervim' is an anagram of 'GRAVIMETER'.
Can you help me to learn more?
(Other definitions for gravimeter that I've seen before include "measuring instrument" , "Measurer of g" .)