Twist of lemon finally placed in extremely elegant drink (7)
I believe the answer is:
entwine
'twist' is the definition.
(I know that entwine is a more specific form of the action twist)
'lemon finally placed in extremely elegant drink' is the wordplay.
'finally' indicates one should take the final letters.
'placed in' indicates putting letters inside (I've seen this in other clues).
'extremely' means to remove the middle letters (only the extremes of the word are used).
'drink' becomes 'wine' (wine is an alcoholic drink).
'elegant' with its middle removed is 'et'.
The final letter of 'lemon' is 'n'.
'n' placed inside 'et' is 'ent'.
'ent'+'wine'='ENTWINE'
'of' is the link.
(Other definitions for entwine that I've seen before include "weave around" , "Interweave" , "Lace" , "knit" , "Get weaving" .)