Deceptive outward appearance (6)
'deceptive outward appearance' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for facade that I've seen before include "Front - mask" , "Walton's setting of Sitwell's verses" , "Sitwell/Walton piece" , "False front" , "Series of notes" .)
(Other definitions for veneer that I've seen before include "Thin wooden covering" , "Face" , "A surface coating or skin" , "Thin outer covering, as fixed to wood" , "Thin decorative covering of fine wood" .)