Importance of tidying jumble (7)
I believe the answer is:
dignity
'importance' is the definition.
(thesaurus)
'tidying jumble' is the wordplay.
'jumble' is an anagram indicator.
'tidying' anagrammed gives 'DIGNITY'.
'of' acts as a link.
(Other definitions for dignity that I've seen before include "Sense of self-importance" , "high position" , "(Self-)esteem" , "Tidying (anag.)" , "Self-respect" .)