Those living there gave cat’s cup no use (9)
I believe the answer is:
occupants
'those living there' is the definition.
I can't tell whether this defines the answer.
'cat's cup no use' is the wordplay.
'use' is an anagram indicator (I've seen 'using' mean this (the letters used in a different way)).
'cats'+'cup'+'no'='catscupno'
'catscupno' is an anagram of 'OCCUPANTS'.
'gave' is the link.
Can you help me to learn more?
(Other definitions for occupants that I've seen before include "people inside?" , "Users" .)