Remember order to return (6)
I believe the answer is:
recall
I believe this is a double definition.
'remember' is the first definition.
(to recall something is to remember it)
'order to return' is the second definition.
(as in recalling someone from a post)
(Other definitions for recall that I've seen before include "Summon back - ability to remember" , "Summon back, perhaps to mind" , "Hark back" , "Don''t forget - come again" , "Evoke" .)