Crossword Genius

Compound connector (6)

Ross

I believe the answer is:

hyphen

(Other definitions for hyphen that I've seen before include "Word-joining mark" , "A horizontal word-joiner" , "Line in a double-barrelled name, say" , "Stroke between syllables or words" , "Dash joining words" .)

I've seen this clue in The Wall Street Journal.
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