Pieces invoking the name of great character (6)
I believe the answer is:
gatsby
'name of great character' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'pieces invoking' is the wordplay.
'pieces' becomes 'gats' (gat is a kind of piece).
'invoking' becomes 'by' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'gats'+'by'='GATSBY'
'the' acts as a link.
Can you help me to learn more?
(Other definitions for gatsby that I've seen before include "Classic novel by F Scott Fitzgerald - 'The Great . . . . . .'" , "Jay, in books" , "Eponymous hero in book" , "Novel millionaire" , "great fictional character" .)