Answer: beesknees

AnswerCrossword Clue
BEESKNEESFirst-rate!
BEESKNEESCat's pajamas
BEESKNEESLiving end
BEESKNEESLiving end, once
BEESKNEESLiving end, old-style
BEESKNEESHeight of excellence, supposedly
BEESKNEESAlternative to cat's pajamas?