One in South African forest is fine after knocking back alcoholic drink (6)
I believe the answer is:
reebok
'one in south african forest' is the definition.
The definition suggests a singular noun which matches the answer.
'fine after knocking back alcoholic drink' is the wordplay.
'fine' becomes 'ok' (synonyms).
'after' means one lot of letters go next to another.
'knocking back' says the letters should be written backwards.
'alcoholic drink' becomes 'beer' (I've seen this before).
'beer' in reverse letter order is 'reeb'.
'ok' after 'reeb' is 'REEBOK'.
'is' is the link.
Can you help me to learn more?
(Other definitions for reebok that I've seen before include "South African animal" , "Antelope of southern Africa" , "South African antelope (E, not H)" , "African runner" .)