Embarrassed Socialist confronted (3-5)
I believe the answer is:
red-faced
'embarrassed' is the definition.
(I've seen this before)
'socialist confronted' is the wordplay.
'socialist' becomes 'red' (red can informally mean a socialist).
'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 "Colourfully embarrassed" , "Embarrassed-looking" , "Blushing" , "Having glowing visage, embarrassed" , "Visibly ashamed" .)