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Hint: something wielded in the Billiard Room (3)

Ross

I believe the answer is:

cue

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'hint' is the definition.
(cue can mean a hint or prompt)

I cannot understand how the rest of the clue works.

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(Other definitions for cue that I've seen before include "A snooker ball striker" , "Billiards stick" , "Tapering stick used by snooker player" , "Signal (to actor)" , "Potter" .)

I've seen this clue in The Independent.
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