Found habit less unsettling (9)
I believe the answer is:
establish
'found' is the definition.
(thesaurus)
'habit less unsettling' is the wordplay.
'unsettling' indicates an anagram.
'habit'+'less'='habitless'
'habitless' is an anagram of 'ESTABLISH'.
(Other definitions for establish that I've seen before include "Create - lodge" , "Found or authenticate" , "Set up or bring into existence" , "Show to be true in his stable" , "Set up or found" .)