Alkie and son flogged quack medicine (5,3)
I believe the answer is:
snake oil
'quack medicine' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'alkie and son flogged' is the wordplay.
'and' is a charade indicator (letters next to each other).
'flogged' indicates an anagram.
'alkie'+'son'='alkieson'
'alkieson' is an anagram of 'SNAKE-OIL'.
Can you help me to learn more?
(Other definitions for snake oil that I've seen before include "this won't make things better" , "Miracle cure" , "Liquid sold as medicine but medically worthless" .)