Making Lee go up, I ruined concluding part (8)
I believe the answer is:
epilogue
'concluding part' is the definition.
(I've seen this before)
'making lee go up i' is the wordplay.
'making' is an anagram indicator.
'lee'+'go'+'up'+'i'='leegoupi'
'leegoupi' anagrammed gives 'EPILOGUE'.
'ruined' is the link.
This may not be right. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for epilogue that I've seen before include "Final section (of play/book)" , "Postscript to play, book etc" , "Final part of book" , "Short speech to the audience at the end of a play" , "Final section (of play)" .)