Once called for a woman, or rather for somebody who listens (3)

I believe the answer is:
nee
'once called' is the definition.
'nee' can be an answer for 'called' (nee may be written to show someone's name at birth). I am not sure about the 'once' bit.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for nee that I've seen before include "Originally named (fem.)" , "Born as (French)" , "Word used to indicate family name of a married woman" , "Prefix indicating maiden name of married woman" , "Prefix denoting woman's unmarried name" .)
