A tree reputedly dangerous up to a point (4)
I believe the answer is:
upas
'a tree' is the definition.
(upas is a species of tree)
'up to a point' is the wordplay.
'to' is a charade indicator (letters next to each other).
'point' becomes 's' (South).
'up'+'a'+'s'='UPAS'
'reputedly dangerous' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for upas that I've seen before include "Source of poison" , "Tree yielding poisonous sap" , "Antiar tree of Java" , "Poisonous Javanese tree" , "Tree from Java with poisonous sap" .)