Shows approval although almost asleep (4)
I believe the answer is:
nods
'shows approval' is the definition.
(I've seen this in another clue)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for nods that I've seen before include "Is careless" , "Affirmative gestures" , "Indicates assent" , "Inclines head" , "gestures in agreement" .)