It alone could produce great delight (7)
I believe the answer is:
elation
'great delight' is the definition.
'elation' can be an answer for 'delight' (I've seen this in another clue). I am not sure about the 'great' bit.
'it alone could produce' is the wordplay.
'could produce' indicates an anagram (I've seen this in other clues).
'it'+'alone'='italone'
'italone' with letters rearranged gives 'ELATION'.
Can you help me to learn more?
(Other definitions for elation that I've seen before include "Feeling of delight or pride" , "State of being delighted or proud" , "'High spirits, exhilaration (7)'" , "Feeling of joy and pride" , "exhibits successful pride" .)