Having tenants phone back (3)
I believe the answer is:
let
'having tenants' is the definition.
I can't judge whether this definition defines the answer.
'phone back' is the wordplay.
'phone' becomes 'tel' (short for telephone).
'back' shows that the letters should be reversed in order.
'tel' written backwards gives 'LET'.
Can you help me to learn more?
(Other definitions for let that I've seen before include "Allow; rental period" , "Reason for scrubbing service" , "Award (a contract)" , "hired" , "Won't stop you" .)