Crossword Genius

Potters stick (3)

Ross

I believe the answer is:

cue

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'stick' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for cue that I've seen before include "Prompt; reminder" , "Catchword" , "Snooker rod" , "signal to come on" , "Prompt; signal" .)

I've seen this clue in The Irish News.
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