Windcheater? (7)
I believe the answer is:
twister
'windcheater?' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
This is the entire clue.
(Other definitions for twister that I've seen before include "Tornado (colloq.)" , "Violent local windstorm (US)" , "Funnel-shaped wind" , "Swindler; tornado (US)" , "See 12" .)