Does such mining have its seamy side? (4)
I believe the answer is:
coal
'side?' is the definition.
The definition and answer can be both natural objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for coal that I've seen before include "Solid fuel" , "slack" , "Carbonaceous rock used as fuel" , "Three domestic fuels" , "Mined fuel" .)
