Feeling ho-hum (5)
I believe the answer is:
bored
'feeling ho-hum' 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 "Filled with ennui" , "Weary and impatient" , "Palled on" , "Short of things to do, maybe" , "Extremely uninterested" .)