Inspect rotating cutting tool at quarry (7)
I believe the answer is:
examine
'inspect' is the definition.
(I know that inspect can be written as examine)
'rotating cutting tool at quarry' is the wordplay.
'rotating' says the letters should be written backwards.
'cutting tool' becomes 'axe' (axe is a kind of cutting tool).
'at' is a charade indicator (letters next to each other).
'quarry' becomes 'mine' (type of mine).
'axe' reversed gives 'exa'.
'exa'+'mine'='EXAMINE'
(Other definitions for examine that I've seen before include "Test or study carefully" , "Inspect, study" , "Look closely at < test" , "vet" , "Inspect , test" .)