Order the thing to take out (4)
I believe the answer is:
omit
'take out' is the definition.
(I know that take out can be written as omit)
'order the thing' is the wordplay.
'order' becomes 'om' (Order of Merit).
'the thing' becomes 'it'.
'om'+'it'='OMIT'
'to' acts as a link.
(Other definitions for omit that I've seen before include "Leave out or overlook" , "Leave out, perhaps in error" , "Leave out or fail to do" , "Don't include" , "Leave out or neglect" .)