Answer:

rebecs

Answer	Crossword Clue
REBECS	Violin precursors
REBECS	Early viols.
REBECS	Medieval musical instruments.

REBECS	Old violins.
REBECS	Strads' precursors
REBECS	Old fiddles
REBECS	Violins' precursors
REBECS	Kin of viols
REBECS	Violin's ancestors