Dispatch to Dilbert (4)
I believe the answer is:
memo
'dispatch to dilbert' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for memo that I've seen before include "Written business message, in short" , "A little something to be remembered" , "Reminder (abbr)" , "Inter-office note" , "Short note or message" .)