Meant to show purpose to the Editor (5)
I believe the answer is:
aimed
'meant' is the definition.
(aiming is a kind of meaning)
'purpose to the editor' is the wordplay.
'purpose' becomes 'aim' (synonyms).
'to the editor' becomes 'ed' (abbreviation).
'aim'+'ed'='AIMED'
'to show' is the link.
(Other definitions for aimed that I've seen before include "Planned, intended to try" , "Set sights on for a dime" , "Tried; pointed" , "Pointed a weapon at" , "Focused on as target" .)