Late crone unexpectedly showing broad-mindedness (9)
I believe the answer is:
tolerance
'broad-mindedness' is the definition.
(thesaurus)
'late crone unexpectedly' is the wordplay.
'unexpectedly' is an anagram indicator.
'late'+'crone'='latecrone'
'latecrone' with letters rearranged gives 'TOLERANCE'.
'showing' acts as a link.
(Other definitions for tolerance that I've seen before include "Broad-minded attitude" , "Ability to endure pain" , "ecumenical spirit?" , "Amount of play" , "Open-mindedness" .)