Sailors' saint (4)
I believe the answer is:
elmo
'sailors' saint' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for elmo that I've seen before include "Fiery saint" , "Puppet character" , "Saint whose fire is electric!" , "Saint whose "fire" occurs around masts etc" , "Saint associated with fire" .)