Noble fellow composed lament, following information (9)
I believe the answer is:
gentleman
'noble fellow' is the definition.
'gentleman' can be an answer for 'fellow' (I've seen this before). I'm unsure of the 'noble' bit.
'composed lament following information' is the wordplay.
'composed' indicates an anagram.
'following' means one lot of letters go next to another.
'information' becomes 'gen' (gen can informally mean information).
'lament' with letters rearranged gives 'tleman'.
'tleman' after 'gen' is 'GENTLEMAN'.
Can you help me to learn more?
(Other definitions for gentleman that I've seen before include "Toff" , "Courteous male" , "A man of refinement" , "Courteous fellow" , "Polite, kind or upper-class fellow" .)