Glower from revolutionary about to receive award (5)
I believe the answer is:
ember
'glower' is the definition.
(something which glows)
'revolutionary about to receive award' is the wordplay.
'revolutionary' is a reversal indicator.
'about' becomes 're' ('re' means regarding or about).
'to receive' is an insertion indicator.
'award' becomes 'MBE' (Member of the British Empire).
're' backwards is 'er'.
'er' enclosing 'mbe' is 'EMBER'.
'from' acts as a link.
(Other definitions for ember that I've seen before include "Material in dying fire" , "Piece of live coal" , "Hot piece of wood or coal from a fire" , "Glowing remainder of a fire" , "Glowing cinder" .)