Answer:

DOZY

AnswerCrossword Clue
DOZYNodding
DOZYHalf asleep
DOZYNodding off
DOZYIn need of some black coffee, perhaps
DOZYHalf-asleep
DOZYReady to conk out
DOZYOn the way out?
DOZYReady for a nap
DOZYHeavy-lidded