Novel character first appearing in another novel (8)
I believe the answer is:
antihero
'novel character' is the definition.
'antihero' can be an answer for 'character' (antihero is a kind of character). I am not certain of the 'novel' bit.
'first appearing in another novel' is the wordplay.
'first' becomes 'i' (Roman numeral for one or first).
'appearing in' indicates putting letters inside.
'novel' indicates anagramming the letters (letters in a new or novel order).
'another' with letters rearranged gives 'anthero'.
'i' going within 'anthero' is 'ANTIHERO'.
Can you help me to learn more?
(Other definitions for antihero that I've seen before include "Protagonist without admirable qualities" , "ignoble character" , "Winston Smith in Orwell's 1984, for example" , "Central character lacking traditional courageous attributes" , "baddie" .)