Finish eg trifle, extremely nice after turnover (3,2)
I believe the answer is:
end up
'finish' is the definition.
(I know that finish can be written as end up)
'eg trifle extremely nice after turnover' is the wordplay.
'eg trifle' becomes 'pud' (trifle is a type of pudding).
'extremely' suggests removing the centre (only the extremes of the word are used).
'after' means one lot of letters go next to another.
'turnover' says the letters should be written in reverse (the letters turn over).
'nice' with its middle removed is 'ne'.
'pud'+'ne'='pudne'
'pudne' back-to-front is 'END UP'.
(Other definitions for end up that I've seen before include "inverted" , "finish ahead" , "Come to rest" , "standing on one's head" , "Arrive eventually" .)