Stage signal (3)

I believe the answer is:

cue

'stage signal' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for cue that I've seen before include "Prompt; reminder" , "Billiards stick" , "Actor's words" , "Reminder to do something" , "Sign" .)

I've seen this clue in the Penny Press, The Times, The Star Tribune, the Newsday, the King Feature Syndicate and The Sunday Times.

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