Character; missive (6)
I believe the answer is:
letter
I believe this clue is a double definition.
'character' is the first definition.
(I know that letter is a type of character)
'missive' is the second definition.
(I know that missive can be written as letter)
(Other definitions for letter that I've seen before include "Epistle, missive" , "Written message" , "A written form of communication" , "he leases" , "Item sent - character" .)