Crossword Genius

In music, an accidental that raises the pitch of the following note by one chromatic semitone (5)

Ross

I believe the answer is:

sharp

(Other definitions for sharp that I've seen before include "Keen-edged" , "Liable to cut" , "Quick; pointed" , "Unscrupulous character" , "Musical notation of a half step higher than the note named" .)

I've seen this clue in The Mirror.
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