Crossword Genius

Grammatical dash (6)

Ross

I believe the answer is:

hyphen

(Other definitions for hyphen that I've seen before include "A horizontal word-joiner" , "seen in T-shirt and G-string" , "Punctuation mark separating words" , "A horizontal word joiner" , "Line in a double-barrelled name, say" .)

I've seen this clue in The Sun.
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