Open-mindedness (9)
I believe the answer is:
tolerance
'open-mindedness' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tolerance that I've seen before include "Ability to be fair" , "Amount of play" , "Ability to stomach (something)" , "Ability to endure something" , "Willingness to accept the beliefs of others" .)