Wife, nag dismissing husband being inferior (5)
I believe the answer is:
worse
'being inferior' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for worse that I've seen before include "Opposite of better" , "More serious" , "Less good" , "More severe; less well" , "Of poorer quality" .)