Bizarre posh and expensive car covered in cork (7)
I believe the answer is:
surreal
'bizarre' is the definition.
(I've seen this before)
'posh and expensive car covered in cork' is the wordplay.
'posh' becomes 'u' (abbreviation for upper-class - opposite to non-u).
'and' means one lot of letters go next to another.
'expensive car' becomes 'rr' (abbreviation for Rolls Royce).
'covered in' is an insertion indicator.
'cork' becomes 'seal'.
'u'+'rr'='urr'
'urr' inserted within 'seal' is 'SURREAL'.
(Other definitions for surreal that I've seen before include "Dreamlike - Dali-like" , "strange" , "Dali being so?" , "Like a dream" , "Daliesque" .)