Noble fellow hurt and sombre (8)
I believe the answer is:
margrave
'noble' is the definition.
(margrave is a kind of noble)
'fellow hurt and sombre' is the wordplay.
'fellow hurt' becomes 'mar' (I've seen this in another clue. I am not sure about the 'fellow' bit.).
'and' means one lot of letters go next to another.
'sombre' becomes 'grave' (I've seen this before).
'mar'+'grave'='MARGRAVE'
Can you help me to learn more?
(Other definitions for margrave that I've seen before include "German nobleman" , "German noble" , "More than count" .)