Alerts (6)
'alerts' is the definition.
(I've seen this in another clue)
This is all the clue.
(Another definition for warns that I've seen is " Tips off".)
'alerts' is the definition.
('alarm' can be a synonym of 'alert')
This is all the clue.
(Other definitions for alarms that I've seen before include "Warnings of danger" , "Frightens and startles" , "Warning clocks that wake us up" , "Danger signals" , "Frightens like warning devices" .)