Signal saying danger has passed (3,5)

I believe the answer is:

all clear

(Other definitions for all clear that I've seen before include "Siren sound to signal end of air raid" , "unlike 21 [GREY AREAS] ?" , "Siren signal that bombing has ended" , "Signal that danger is past" , "no further questions needed" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.

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