Comic book seen represented element (9)
I believe the answer is:
manganese
'element' is the definition.
(manganese is a chemical element)
'comic book seen represented' is the wordplay.
I cannot quite understand how this works, but
'comic' could be 'manga' (type of Japanese comic) and 'manga' is located in the answer.
an anagram of 'seen' is 'nese' which is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for manganese that I've seen before include "Hard grey metal, Mn" , "Metal used in steel alloys" , "Metallic element used in steels" , "Metal used in some steels" , "steel component" .)