Exotic dancer dismisses d?cor, as it's wide of the mark (7)
I believe the answer is:
inexact
'wide of the mark' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for inexact that I've seen before include "Not entirely accurate" , "Not precise, approximate" , "not precisely correct" , "Not precise, like some sciences" , "Woolly" .)