Agreement from Tory is laid in ruins (10)
I believe the answer is:
solidarity
'agreement' is the definition.
(thesaurus)
'tory is laid in ruins' is the wordplay.
'in ruins' indicates anagramming the letters.
'tory'+'is'+'laid'='toryislaid'
'toryislaid' anagrammed gives 'SOLIDARITY'.
'from' acts as a link.
(Other definitions for solidarity that I've seen before include "Showing oneness" , "Supposed alien pattern in corn" , "Mutual support within a group" , "Team spirit" , "Unity" .)