One's put out of order when attacked (3,4)
I believe the answer is:
set upon
'attacked' is the definition.
(I've seen this before)
'one's put out of order' is the wordplay.
'out of order' indicates anagramming the letters.
'ones'+'put'='onesput'
'onesput' anagrammed gives 'SET UPON'.
'when' acts as a link.
(Other definitions for set upon that I've seen before include "Attacked" , "Mug" , "Attack" , "Determined to do (something)" .)