What might be Beth’s landlord? (6)
I believe the answer is:
letter
I believe this is a double definition.
'what might be beth's' is the first definition.
(beth is a letter of the Hebrew alphabet)
'landlord?' is the second definition.
(landlords let property)
(Other definitions for letter that I've seen before include "Written message" , "Alphabetic character" , "Alphabetic symbol" , "Eg, A" , "Form of correspondence" .)