Facade even confused Cockney girl (6)
I believe the answer is:
veneer
'facade' is the definition.
(I've seen this before)
'even confused cockney girl' is the wordplay.
'confused' indicates an anagram.
'cockney girl' becomes ''er' ('her' - 'her' refers to a girl or woman - said with a cockney accent, dropping the 'H').
'even' anagrammed gives 'vene'.
'vene'+'er'='VENEER'
(Other definitions for veneer that I've seen before include "Superficial shine" , "Thin coating on a surface" , "Thin layer of wood or plastic" , "Thin skin on surface" , "Thin layer on surface, often of furniture" .)