Blunders and fears losing face (6)
I believe the answer is:
errors
'blunders' is the definition.
(I know this)
'fears losing face' is the wordplay.
'fears' becomes 'terrors' (terror is a kind of fear).
'losing face' means to remove the first letter.
'terrors' with its first letter taken off is 'ERRORS'.
'and' acts as a link.
(Other definitions for errors that I've seen before include "Gaffes" , "Faults" , "Fallacies, mistakes" , "Mistakes and omissions" , "Mistakes and inaccuracies" .)