Heal dog, to a point (4)
I believe the answer is:
cure
'heal' is the definition.
('cure' can be a synonym of 'heal')
'dog to a point' is the wordplay.
'dog' becomes 'cur' (cur is a kind of dog).
'to a point' becomes 'e' (E is an example**).
'cur'+'e'='CURE'
(Other definitions for cure that I've seen before include "Make better - smoke" , "priest from 22 [ALSACE]" , "priest without an accent" , "Make well again" , "Preserve by smoking - make better" .)