Out of order having stomach upset (4)
I believe the answer is:
down
This clue is a triple definition!
'out of order' is the first definition.
(both can mean temporarily broken)
'having' is a link.
'stomach' is the second definition.
(thesaurus)
'upset' is the third definition.
(thesaurus)
(Other definitions for down that I've seen before include "Dispirited" , "Out of sorts" , "Depressed; swallow" , "Melancholy" , "Some 13 Acrosses" .)