Answer: cdef

AnswerCrossword Clue
CDEF

B-G link

CDEF

Scale opening

CDEF

Scale starter

CDEF
Start of a basic scale
CDEF
Half of a major scale
CDEFB-G connection
CDEFAlphabet quartet
CDEFStart of a scale with no flats or sharps
CDEFB-G connectors
CDEFAlphabetic sequence
CDEFB train
CDEFAlphabetic quartet
CDEFAlphabetical quartet
CDEFScale start
CDEFPreceders of G
CDEFCertain scale start
CDEFB's tail?
CDEFAlphabet run
CDEFAlphabetical run
CDEFKeyboard sequence
CDEFAB followers
CDEFAlphabet string
CDEFAlphabetic run