Dip, ours, comes unexpectedly bringing unease (12)
I believe the answer is:
discomposure
'unease' is the definition.
(thesaurus)
'dip ours comes unexpectedly' is the wordplay.
'unexpectedly' is an anagram indicator.
'dip'+'ours'+'comes'='dipourscomes'
'dipourscomes' is an anagram of 'DISCOMPOSURE'.
'bringing' acts as a link.
(Other definitions for discomposure that I've seen before include "unease" , "Upset" .)