Yawning, perhaps (5)
I believe the answer is:
bored
'yawning perhaps' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bored that I've seen before include "Weary and impatient" , "Palled on" , "Lacking stimulation" , "Filled with tedium" , "World-weary" .)