Make young in spirit (6)
I believe the answer is:
brandy
'spirit' is the definition.
(alcoholic spirit)
'make young' is the wordplay.
I cannot really understand how this works, but
'make' could be 'brand' (synonyms) and 'brand' is found within the answer.
'young' could be 'y' and 'y' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'in' acts as a link.
Can you help me to learn more?
(Other definitions for brandy that I've seen before include "Utensil or shop" , "How to get a drink" , "Liquor distilled from wine" , "Alcoholic drink" , "Cognac is a well-known one" .)