Sanctimonious husband's lie on oath hurt badly (6-4-4)
I believe the answer is:
holier-than-thou
'sanctimonious' is the definition.
(synonyms)
'husband's lie on oath hurt badly' is the wordplay.
'husband' becomes 'h'.
'badly' indicates anagramming the letters.
'lie'+'on'+'oath'+'hurt'='lieonoathhurt'
'lieonoathhurt' anagrammed gives 'olierthanthou'.
'h'+'olierthanthou'='HOLIER-THAN-THOU'
(Other definitions for holier-than-thou that I've seen before include "Self-righteous" , "Sanctimonious" .)