Point or points to support (7)
I believe the answer is:
endorse
'support' is the definition.
(endorsing is a kind of supporting)
'point or points' is the wordplay.
'point' becomes 'end' (end is a kind of point**).
'points' becomes 'se'.
'end'+'or'+'se'='ENDORSE'
'to' is the link.
(Other definitions for endorse that I've seen before include "Sore end (anag.)" , "Put one's name to, approve" , "Uphold" , "Rubber-stamp" , "Approve officially" .)