Landlord? A character (6)
I believe the answer is:
letter
This clue is a double definition.
'landlord?' is the first definition.
(landlords let property)
'a character' is the second definition.
(letter is a kind of character)
(Other definitions for letter that I've seen before include "who may offer terms to residents?" , "Character - landlord - epistle" , "Communication via the postman" , "A written form of communication" , "A, B or C, for example" .)