Crossword Genius

Casual firing range warning? (3-4)

Ross

I believe the answer is:

pot-shot

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This might be a double definition.

'casual firing' is the first definition.
The definition suggests a singular noun which matches the answer.

'range warning?' is the second definition.
The definition suggests a singular noun which matches the answer.

Can you help me to learn more?

(Another definition for pot-shot that I've seen is " Random attack or criticism".)

I've seen this clue in The Times.
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