Flushed, but hardly flush, in this (3)
I believe the answer is:
red
This clue is a double definition.
'flushed' is the first definition.
(red-faced)
'hardly flush in this' is the second definition.
(someone 'in the red' is not financially flush)
'but' acts as a link.
(Other definitions for red that I've seen before include "Merchant flag" , "- Cross; - admiral" , "Glowing" , "Colour of 1 across" , "Florid" .)