Representative may get an order (5)
I believe the answer is:
agent
'representative' is the definition.
(agent is a kind of representative)
'get an order' is the wordplay.
'order' indicates an anagram.
'get'+'an'='getan'
'getan' with letters rearranged gives 'AGENT'.
'may' is the link.
(Other definitions for agent that I've seen before include "One acting on behalf of another" , "One may be working" , "who can act?" , "Catalyst" , "that may be secret?" .)