One without regrets maybe needing to change husband (5)
I believe the answer is:
edith
'one without regrets maybe' is the definition.
(Edith Piaf sang 'No, I do not regret anything')
'to change husband' is the wordplay.
'to change' becomes 'edit' (edit can mean to change or alter).
'husband' becomes 'h'.
'edit'+'h'='EDITH'
'needing' is the link.
(Other definitions for edith that I've seen before include "Cavell, Piaf or Wharton" , "Evans, Sitwell or Piaf" , "- - Piaf, singer" , "Eg Cavell" , "Osbert's sister" .)