There are two points he can possibly raise (7)
I believe the answer is:
enhance
'raise' is the definition.
(synonyms)
'there are two points he can' is the wordplay.
I cannot quite see how this works, but
'are' could be 'a' (short for 'are', historical unit of measurement) and 'a' is present in the answer.
'points' could be 'en' (compass points east and north) and 'en' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'possibly' acts as a link.
Can you help me to learn more?
(Other definitions for enhance that I've seen before include "Boost" , "Heighten, intensify" , "'Improve, augment (7)'" , "To improve matters" , "Improve the value of (something)" .)