Hack about, left and right, winning hole at last (8)
I believe the answer is:
reporter
'hack' is the definition.
(informal term for a journalist)
'left and right winning hole at last' is the wordplay.
'left' becomes 'porter' (I am not sure about this - if you are sure you should believe this answer much more).
'and' says to put letters next to each other.
'right' becomes 'r' (common abbreviation).
'winning' is an insertion indicator (some letters win or obtain others).
'at last' indicates one should take the final letters.
The final letter of 'hole' is 'e'.
'porter' put after 'r' is 'rporter'.
'rporter' enclosing 'e' is 'REPORTER'.
'about' acts as a link.
Can you help me to learn more?
(Other definitions for reporter that I've seen before include "He gives details" , "Newsman" , "One may write a column" , "Journo" , "Hack" .)