Go one better around hard fellow (4)
I believe the answer is:
chap
'fellow' is the definition.
(synonyms)
'go one better around hard' is the wordplay.
'go one better' becomes 'cap' (I can't explain this - if you can you should believe this answer much more).
'around' means one lot of letters goes inside another.
'hard' becomes 'h' (abbreviation used in pencil classifications).
'cap' placed around 'h' is 'CHAP'.
Can you help me to learn more?
(Other definitions for chap that I've seen before include "Fellow < makes > crack" , "Become raw from cold - fellow" , "Split in skin" , "Bloke, fellow" , "Fish" .)