If a rule is broken it is nothing to be proud of (7)
I believe the answer is:
failure
'it is nothing to be proud of' is the definition.
The definition suggests a singular noun which matches the answer.
'if a rule is broken' is the wordplay.
'is broken' indicates anagramming the letters.
'if'+'a'+'rule'='ifarule'
'ifarule' anagrammed gives 'FAILURE'.
Can you help me to learn more?
(Other definitions for failure that I've seen before include "Collapse; disaster" , "No-hoper" , "[OPPOSITE OF] success" , "Lack of success, or he who lacks it" , "Breakdown; flop" .)