Woman showing some regret, always (5)
I believe the answer is:
greta
'woman' is the definition.
'some regret always' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'GRETA' is hidden in the letters of 'regret always'.
'showing' acts as a link.
(Other definitions for greta that I've seen before include ".....Garbo, who wanted to be alone" , "- Garbo, Swedish actress" , "Miss Garbo" , "- Garbo, Swed. actress" , "'I want to be alone' - ?.. Garbo (5)" .)