Crossword Genius

Samuel ___, American inventor of a single-wire telegraph system and a code which bears his name (5)

Ross

I believe the answer is:

morse

(Other definitions for morse that I've seen before include "Code inventor, Samuel" , "One who enjoyed solving code" , "TV inspector" , "& 24 Across Encrypted language" , "Kind of code" .)

I've seen this clue in The Independent.
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