One tycoon gets by flogging feel-good drug (8)
I believe the answer is:
oxytocin
'drug' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'one tycoon gets by flogging feel-good' is the wordplay.
I cannot really see how this works, but
'one' could be 'i' (Roman numeral) and 'i' is found within the answer.
'by' could be 'x' (multiplication sign) and 'x' is present in the answer.
an anagram of 'tycoon' is 'oytocn' which is present in the left over letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for oxytocin that I've seen before include "Pituitary hormone" , "Hormone important in childbirth" .)