One way to play (5)
I believe the answer is:
dirty
'one way to play' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dirty that I've seen before include "Obscene - unfair" , "Unclean or indecent" , "Unscrupulous" , "Foul; filthy" , "Muddy" .)