Certain to be in tears breaking up valuables (9)
I believe the answer is:
treasures
'up valuables' is the definition.
The answer and definition can be both related to property as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'certain to be in tears breaking' is the wordplay.
'certain' becomes 'sure' ('sure' can be a synonym of 'certain').
'to be in' is an insertion indicator.
'breaking' indicates an anagram.
'tears' is an anagram of 'treas'.
'sure' inserted within 'treas' is 'TREASURES'.
Can you help me to learn more?
(Other definitions for treasures that I've seen before include "Holds dear, prizes" , "Values" , "lots of valuables" .)