Demanded tidiness for a change (8)
I believe the answer is:
insisted
'demanded' is the definition.
(I've seen this before)
'tidiness for a change' is the wordplay.
'for a change' is an anagram indicator.
'tidiness' with letters rearranged gives 'INSISTED'.
(Other definitions for insisted that I've seen before include "Declared emphatically about tidiness" , "Demanded firmly" , "Maintained firmly" , "Asserted, took a firm stand" , "Stated emphatically, refusing to budge" .)