No, I am wrong; she was Ruth's mother-in-law (5)
I believe the answer is:
naomi
'ruth's mother-in-law' is the definition.
(biblical figure)
'no i am wrong' is the wordplay.
'wrong' is an anagram indicator.
'no'+'i'+'am'='noiam'
'noiam' anagrammed gives 'NAOMI'.
'she was' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for naomi that I've seen before include "Girl's name -- I moan (anag)" , "Biblical mother-in-law of Ruth" , "woman in the Bible" , "-- Campbell, British model" , "Girl's name, meaning "pleasant"" .)