Chiefly American stone quarry (3)
I believe the answer is:
pit
This clue might be a double definition.
'chiefly american stone' is the first definition.
'pit' can be an answer for 'stone' (synonyms). I am not sure about the 'chiefly american' bit.
'quarry' is the second definition.
(I know that quarry can be written as pit)
Can you help me to learn more?
(Other definitions for pit that I've seen before include "Tip into hole" , "Coal mine" , "Quarry" , "Hollow" , "Stop to refuel" .)