Distress signal (5)
'distress signal' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for alarm that I've seen before include "Shock; danger signal" , "Frighten, scare" , "Warning bell" , "Frighten or startle" , "Frighten, disturb" .)
'distress signal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for flare that I've seen before include "Spread" , "signalling light" , "Widen out like a bell" , "Blaze; distress signal" , "Distress signal; burst out angrily" .)
'distress signal' is the definition.
(I know that Mayday is a type of distress signal)
This is all the clue.
(Other definitions for mayday that I've seen before include "Cry of distress" , "please help" , "call for help?" , "International radio distress signal" , "Request for help" .)
'distress signal' is the definition.
(SOS is an example)
This is all the clue.
(Other definitions for sos that I've seen before include "Mayday call" , "urgent appeal" , "Coded distress signal" , "plea" , "Appeal for help" .)
'distress signal' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for may day that I've seen before include "Bank holiday - distress signal (3,3;6)" , "International distress signal as from ship needing help" , "Emergency call" , "01/05/2017" , "SOS" .)
(Another definition for s o s that I've seen is " Distress call".)