Key with one sharp: Abbr. Crossword Clue

 The answer to the crossword clue "Key with one sharp: Abbr." is G MAJ.

A key signature is a set of sharps or flats that appear at the beginning of a musical staff to indicate which notes are to be played sharp or flat. The key of G major has one sharp, which is F sharp. The abbreviation for G major is "G MAJ".

Here are some other possible answers to the crossword clue "Key with one sharp: Abbr.":

G# MAJ

F# MAJ

E MAJ

D MAJ

C MAJ

B MAJ

However, the most likely answer is G MAJ, as it is the only key with one sharp that is commonly used in music.