Sign an order at two points (4)
I believe the answer is:
omen
'sign' is the definition.
(omen is a kind of sign)
'an order at two points' is the wordplay.
'an order' becomes 'om' (Order of Merit).
'at' says to put letters next to each other.
'two points' becomes 'en'.
'om'+'en'='OMEN'
(Other definitions for omen that I've seen before include "Sign of a future event, good or bad" , "Harbinger, augury" , "Augury, portent" , "Event regarded as a prophetic sign of good or evil" , "Portent, prophetic indicator" .)