Slip certificate into printed communication with abbreviated exam result (4,3)
I believe the answer is:
faux pas
'slip' is the definition.
(I know that slip can be written as faux pas)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for faux pas that I've seen before include "Mistake" , "Social error" , "Social gaffe" , "Socially tactless act" , "Socially awkward act" .)