Found his stable in ruins (9)
I believe the answer is:
establish
'found' is the definition.
(thesaurus)
'his stable in ruins' is the wordplay.
'in ruins' indicates anagramming the letters.
'his'+'stable'='hisstable'
'hisstable' anagrammed gives 'ESTABLISH'.
(Other definitions for establish that I've seen before include "Set up a business or prove to be true" , "Set up or found" , "Found - institute" , "form" , "Verify" .)