Pit (4)

'pit' is the definition.
(mining pit)
This is the entire clue.
(Other definitions for mine that I've seen before include "I made?" , "Coalpit" , "Pit; explosive device" , "Excavate for minerals" , "Explosive device concealed in ground" .)
'pit' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for colliery that I've seen before include "Coalmine and surrounding buildings" , "Coal mine" , "Grimethorpe?" , "Pit" , "Coal-mining establishment" .)