Out of bed before usual alarm (5)
I believe the answer is:
upset
'alarm' is the definition.
(thesaurus)
'out of bed before usual' is the wordplay.
'out of bed' becomes 'up' (synonyms).
'before' says to put letters next to each other.
'usual' becomes 'set' (I've seen this in other clues).
'up'+'set'='UPSET'
(Other definitions for upset that I've seen before include "Disordered - unexpected defeat" , "Disturb or knock over" , "bug" , "Unhappy or worried state of mind" , "Spilt - annoyed" .)