Lusty Alan touched butt (4,5)
I believe the answer is:
aunt sally
'butt' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?
'lusty alan touched' is the wordplay.
'touched' is an anagram indicator (letters touched or moved about).
'lusty'+'alan'='lustyalan'
'lustyalan' is an anagram of 'AUNT SALLY'.
Can you help me to learn more?
(Other definitions for aunt sally that I've seen before include "One easily attacked" , "Deliberately easy target for criticism" , "Family member" , "laughing stock" , "Family friend" .)