Disgruntled US agent getting out of bed (3,2)
I believe the answer is:
fed up
'disgruntled' is the definition.
(I've seen this before)
'us agent getting out of bed' is the wordplay.
'us agent' becomes 'fed' (short for a federal agent).
'getting' says to put letters next to each other.
'out of bed' becomes 'up' (synonyms).
'fed'+'up'='FED UP'
(Other definitions for fed up that I've seen before include "far from happy?" , "Sick of eating" , "Disgruntled (colloq.)" , "Catered for on flight" , "Dissatisfied" .)