Flaws, defects (6)
I believe the answer is:
faults
This clue is a double definition.
'flaws' is the first definition.
('fault' can be a synonym of 'flaw')
'defects' is the second definition.
(I know this)
(Other definitions for faults that I've seen before include "Flaws or failings" , "Defects and failings" , "Weakness or failings" , "Flaws - defects" , "'Flaws, imperfections (6)'" .)