Blazing about Republican, OK? (7)
I believe the answer is:
Here is my best explanation:
'ok?' is the definition.
('alright' can be a synonym of 'ok')
'blazing about republican' is the subsidiary indication.
'blazing' becomes 'alight' ('alight' can be a synonym of 'blazing').
'about' means one lot of letters goes inside another.
'republican' becomes 'r' (abbreviation).
'alight' enclosing 'r' is 'alright'.
(Other definitions for alright that I've seen before include "very well, as some would put it", "Satisfactory or adequate", "Okay", "uninjured", "Fine; agreed", "Acceptable", "satisfactory for some of us" and "OK, as some would have it".)