Titled eccentric opposed to dabblers in art (10)
I believe the answer is:
dilettanti
'dabblers in art' is the definition.
'titled eccentric opposed' is the wordplay.
'eccentric' is an anagram indicator.
'opposed' becomes 'anti' (I've seen this before).
'titled' is an anagram of 'dilett'.
'dilett'+'anti'='DILETTANTI'
'to' is the link.
(Other definitions for dilettanti that I've seen before include "Superficial dabblers" , "those who dabble" , "amateurs" , "art lovers" .)