The most common and most likely answer to this crossword clue is the 9 letter word COALFIELD
I've seen this crossword clue in Financial Times
C
O
A
L
F
I
E
L
D
Buddy explains!
The straight part
We know that "Where you might find miner" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case where you might find miner = coalfield.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does COALFIELD mean?
COALFIELD noun- Any region containing deposits of coal that may be mined.