Character gets tipsy at last on liquor in festive atmosphere (5,6)
I believe the answer is:
party spirit
'festive atmosphere' is the definition.
(I've seen this before)
'character gets tipsy at last on liquor' is the wordplay.
I cannot quite see how this works, but
'character' could be 'spirit' (spirit is a kind of character) and 'spirit' is located in the answer.
'last' could be 't' (I've seen this in other clues) and 't' is found in the answer.
This may be the basis of clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for party spirit that I've seen before include "Unreasonable factiousness in" , "Festive atmosphere" .)