Ruined - yet ran to a lawyer (8)
I believe the answer is:
attorney
'a lawyer' is the definition.
(I know that lawyer can be written as attorney)
'ruined yet ran to' is the wordplay.
'ruined' is an anagram indicator.
'yet'+'ran'+'to'='yetranto'
'yetranto' with letters rearranged gives 'ATTORNEY'.
(Other definitions for attorney that I've seen before include "Legal representative" , "Person legally appointed to act for another" , "- jar; - tent; - metal" , "profession" , "Solicitor or barrister" .)