Not being prepared to suffer one clarinet playing (11)
I believe the answer is:
intolerance
'not being prepared to suffer' is the definition.
'one clarinet playing' is the wordplay.
'playing' indicates anagramming the letters.
'one'+'clarinet'='oneclarinet'
'oneclarinet' is an anagram of 'INTOLERANCE'.
(Other definitions for intolerance that I've seen before include "Unreasonable refusal to accept" , "bigotry" , "Inability to endure (something)" , "illiberal attitude" , "D W Griffith film" .)