Friend regularly looking embarrassed (3)
I believe the answer is:
red
'looking embarrassed' is the definition.
(I've seen this before)
'friend regularly' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternating letters of 'friend' are 'RED'.
(Other definitions for red that I've seen before include "Flushed" , "Colour of blood" , "Blood-coloured" , "14 -- breed of 4" , "See it and become angry" .)