Answer: ALT

AnswerCrossword Clue
ALTUp-in-the-air no.?
ALTHt.
ALTSpace-bar neighbor
ALTKey on a keyboard's bottom row
ALTFt. above sea level
ALTKey beside the space bar
ALT...-rock (musical genre)
ALTMusic-genre qualifier
ALTCockpit abbr.
ALTCtrl. cousin
ALTPilot's concern: Abbr.
ALTElevation (abbr.)
ALTFlight stat.
ALTFlying fig.
ALTHigh no.?
ALTCarol of "Private Parts"
ALTPC key beside the space bar
ALTBottom-row PC key
ALTFt. above sea level, to a pilot
ALTPC key that's useless when pressed alone
altalternate
ALTCertain modifier key
ALTHigh, in music
ALTHigh, musically
ALTModel Carol
ALTPC key
ALTSupermodel Carol
ALTSpacebar neighbor
ALTCover girl, Carol
ALTElev.
ALTComputer key below z
ALTHeight: abbr.
ALTComputer key
ALTSpace bar neighbor
ALTWord before rock or comics
ALTKey near space
ALTKey that changes what other keys do
ALTHgt.
ALTHigh, on a score
ALTDetour abbr.