That guy inside, George, ends making some special butter (4)
I believe the answer is:
ghee
'some special butter' is the definition.
'ghee' can be an answer for 'butter' (ghee is a kind of butter). I am not certain of the 'some special' bit.
'that guy inside george ends' is the wordplay.
'that guy' becomes 'he'.
'inside' indicates putting letters inside.
'ends' means to remove the middle letters.
'george' with its centre taken out is 'ge'.
'he' going into 'ge' is 'GHEE'.
'making' acts as a link.
Can you help me to learn more?
(Other definitions for ghee that I've seen before include "type of butter" , "clarified product" , "Clarified butter used in Indian cookery" , "Clarified butter used in Indian cooking" , "Clarified butter sauce" .)