Answer: harpo

AnswerCrossword Clue
HARPOJulius : Groucho :: Arthur : ...
HARPOOne of Zeppo's brothers
HARPOMute Marx
HARPO"Duck Soup" brother
HARPOHorn-honking Marx
HARPOThe silent Marx
HARPOMute Marx brother
HARPOCurly-haired Marx brother
HARPOOprah's company
HARPOSilent movie star?
HARPOHorn-honking Marx brother
HARPOOne of Groucho's bros
HARPOHonking film brother
HARPOMarx Brother with a horn
HARPOOprah Winfrey's company
HARPOCharacter who communicated with a horn
HARPOFamed mime of old films
HARPOMs. Winfrey's production company
HARPOOne of Groucho's brothers
HARPOSilent film comic
HARPOMarx brother who never spoke
HARPOSilent screen star
HARPOArthur Marx, familiarly
HARPOGroucho's brother
HARPOWinfrey's production company
HARPOChico's bro
HARPOMum Marx
HARPOMadcap movie mute
HARPO"... Speaks!" (1961 autobiography)
HARPOSilent film star's nickname?
HARPOMarx with a horn
HARPOChico's brother
HARPOA Marx
HARPOSilent film star
HARPOActor-public speaker who often began "Unaccustomed as I am to speaking ..."
HARPONoted horn honker
HARPOCurly-haired pantomimist
HARPOSilent film star?
HARPOFunnyman with a horn
HARPOSpeechless fellow?