Coal hole (4)
This clue could be a double definition.
'coal' is the first definition.
The answer and definition can be both natural objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'hole?' is the second definition.
(pit is a kind of hole)
Can you help me to learn more?
(Other definitions for pit that I've seen before include "Match (one's wits); mine" , "part of theatre" , "Large hole; mine" , "Portland stone" , "where orchestra plays" .)
'coal hole' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for mine that I've seen before include "Pit; explosive device" , "Source of wealth" , "Store" , "Tunnel for extraction of coal etc" , "Pit; belonging to me" .)