Sign of distress (3)
I believe the answer is:
sos
(Other definitions for sos that I've seen before include "Call for help" , "Morse Code for help" , "Mayday call" , "Appeal for help" , "Help initially, Mr Morse" .)
I believe the answer is:
sos
(Other definitions for sos that I've seen before include "Call for help" , "Morse Code for help" , "Mayday call" , "Appeal for help" , "Help initially, Mr Morse" .)