Embarrassed-looking Marxist confronted (3-5)
I believe the answer is:
red-faced
'embarrassed-looking' is the definition.
(I've seen this before)
'marxist confronted' is the wordplay.
'marxist' becomes 'red' (red can mean a revolutionary).
'confronted' becomes 'faced' ('face' can be a synonym of 'confront').
'red'+'faced'='RED-FACED'
(Other definitions for red-faced that I've seen before include "Visibly ashamed" , "Having glowing visage, embarrassed" , "Blushing" , "Visibly embarrassed with ruddy complexion" , "Embarrassed-looking" .)