The most common and most likely answer to this crossword clue is the 8 letter word SLINGING
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Buddy explains!
The straight part
We know that "playing with catapult" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case playing with catapult = slinging.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 SLINGING mean?
SLINGING verb- To throw with a circular or arcing motion.
- To throw with a sling.
- To pass a rope around (a cask, gun, etc.) preparatory to attaching a hoisting or lowering tackle.
- To sell, peddle, or distribute illicitly (e.g. drugs, sex, etc.).