Answer: DFLAT

AnswerCrossword Clue
DFLATCertain keynote
DFLATC-sharp alias
DFLATC neighbor
DFLATBlack piano key
DFLATKey of Prokofiev's Piano Concerto No. 1
DFLATMajor scale that has F as the third note
DFLATNote a whole step above B
DFLATEnharmonic of B double sharp
DFLATPiano key.
DFLAT"Clair de lune" key
DFLATA k a C sharp
DFLATC sharp
DFLATChopin's "Raindrop" Prelude is in it
DFLATMajor key that uses all five black keys on a piano
DFLATLiszt's "Consolation No. 3" is in it
DFLATKey of Debussy's "Claire de Lune"
DFLATLiszt's "Etude in ... Major"
DFLATNote just above C
DFLATA semitone above C
DFLATChopin's "Nocturne in .... Major"
DFLATKey of Chopin's Berceuse op. 57
DFLATKey above C
DFLATKey of Chopin's "Minute Waltz"
DFLATKey of Prokofiev's first piano concerto
DFLATC sharp equivalent
DFLATKey of Chopin's "Raindrop Prelude"
DFLATC sharp, equivalently
DFLATBlack key
DFLATC sharp's equivalent
DFLATEquivalent of C sharp
DFLATNote above C
DFLATNote near C
DFLATDiminished fifth, in G
DFLATBlack key after C
DFLATKey of "Clair de Lune"
DFLATC sharp alias