19 across
Alarm
son
accompanying
trim
Papas’
woman
(5)
Alarm son accompanying trim Papas’ woman (5)
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The definition is at the beginning of the clue.
How the clue works
The definition is Alarm. Take S for son, then IRENE — as in Irene Papas, the actress — "trimmed" of its last letter to give you IREN, and put the two together.