The most common and most likely answer to this crossword clue is the 8 letter word GAMBLING
I've seen this crossword clue in The Daily Telegraph
G
A
M
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L
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G
Buddy explains!

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 GAMBLING mean?
GAMBLING verb- To take a risk, with the potential of a positive outcome.
- To play risky games, especially casino games, for monetary gain.
- To risk (something) for potential gain.
- To interact with equipment at a casino
- An activity characterised by a balance between winning and losing that is governed by a mixture of skill and chance, usually with money wagered on the outcome.