A supporter like this coming round to the point (7)
I believe the answer is:
apropos
'to the point' is the definition.
(I've seen this before)
'a supporter like this coming round' is the wordplay.
'supporter' becomes 'prop' (I've seen this before).
'like this' becomes 'so' ('like so').
'coming round' is a reversal indicator.
'so' backwards is 'os'.
'a'+'prop'+'os'='APROPOS'
(Other definitions for apropos that I've seen before include "by the way" , "Concerned with" , "Touching" , "Poor sap (anag) - to the purpose" , "suitably" .)