Crossword Genius

Line of waiters, we hear, may be prompt (3)

Ross

I believe the answer is:

cue

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

'line of waiters we hear' is the wordplay.
'line of waiters' becomes 'queue' (I've seen this in another clue).
'we hear' shows a homophone (sound like).
'queue' is a homophone of 'CUE'.

'may' is the link.

(Other definitions for cue that I've seen before include "Signal (to actor)" , "signal to come on" , "Snooker rod" , "Prompt; reminder" , "On a car[D?] this would give a prompt" .)

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