Feel dejected and apathetic (4)
I believe the answer is:
mope
'feel dejected and apathetic' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for mope that I've seen before include "Be listless and apathetic" , "Pine - sulk" , "Move around slowly and aimlessly" , "Brood over a poem" , "Misery guts" .)