Blushing (9)
'blushing' is the definition.
(blushing makes someone's face go red)
This is all the clue.
(Other definitions for red that I've seen before include "Crimson" , "Looking embarrassed" , "Flushed" , "- - poker: Kniphofia" , "could be a Marxist" .)
'blushing' is the definition.
(I know that blushing can be written as reddening)
This is all the clue.