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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Alto's "instrument":

VIOLA: Alto instrument
ENGLISHHORN: Alto instrument
VIOL: Alto clef instrument
VOICE: Alto's "instrument"
SAX: Alto or tenor instrument, informally
SAX: Alto or soprano instrument, briefly
VIOLA: Instrument associated with the alto clef