Wrought iron panel is peerless! (9)
I believe the answer is:
nonpareil
'is peerless' is the definition.
(synonyms)
'wrought iron panel' is the wordplay.
'wrought' indicates anagramming the letters (I've seen this in other clues).
'iron'+'panel'='ironpanel'
'ironpanel' is an anagram of 'NONPAREIL'.
(Other definitions for nonpareil that I've seen before include "Without equal or rival, from France" , "ideal" , "unmatched!" , "Iron panel (anag.)" , "having no match" .)