Answer: SOST

AnswerCrossword Clue
SOST.. ped.: piano music instruction
SOSTProlonged: Mus. abbr.
SOSTMusical abbreviation.
SOSTMusical direction: Abbr.
SOSTHeld for full time value: Mus. abbr.
SOSTDirection in music: Abbr.
SOSTMusical term: Abbr.
SOSTHeld, as a tone: Mus. abbr.
SOSTProlonged, in music: Abbr.