A staff of five lines connected at the left end by a symbol; this symbol contains an arrow which points to the second line, indicating that that line is middle C ( c1). This clef is sometimes used for the notation of the mezzo soprano part because it facilitates the printing of the part with minimal use of ledger lines. This clef is rarely used. See also C Clef; [Fr.] Clef d'ut; [Ger.] C-Schlussel; [It.] Chiave di tenore.