Embarrassing failure (6)
I believe the answer is:
fiasco
'embarrassing failure' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for fiasco that I've seen before include "Debacle, a right mess" , "bomb" , "Farcical disaster" , "A hopeless mess or ludicrous failure" , "Ignominious failure" .)