Moral lapses to bear deserting Serbians (4)
I believe the answer is:
sins
'moral lapses' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for sins that I've seen before include "Wrongdoings" , "Breaches of moral law" , "Transgresses" , "Serious offences" , "Moral lapses" .)