Redeeming quality of Miss Darling? (6,5)
I believe the answer is:
saving grace
'redeeming quality' is the definition.
(a redeeming quality or feature)
'miss darling?' is the wordplay.
'miss' becomes 'saving' (I am not sure about this - if you are sure you should believe this answer much more).
'darling?' becomes 'grace' (Grace Darling saved lives after an s8v8 shipwreck).
'saving'+'grace'='SAVING GRACE'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for saving grace that I've seen before include "Redeeming quality" , "Compensatory good point" , "a description of Miss Darling?" , "What stops one condemning" , "Redeeming feature" .)