Drink after retiring turned into delight (7)
I believe the answer is:
elation
'delight' is the definition.
(I've seen this before)
'drink after retiring turned into' is the wordplay.
'drink' becomes 'ale' (type of beer).
'after retiring' is a reversal indicator (retire can mean to go back).
'turned' indicates anagramming the letters.
'ale' in reverse letter order is 'ela'.
'into' is an anagram of 'tion'.
'ela'+'tion'='ELATION'
(Other definitions for elation that I've seen before include "There's great joy" , "Feeling of intense delight" , "High feeling?" , "Delight, thrill" , "Feeling of joy and pride" .)