Cheats at chess? (5)

I believe the answer is:

rooks

I'm a little stuck... Click here to teach me more about this clue!

'cheats' is the definition.
(rooking is a kind of cheating)

I cannot understand how the rest of the clue works.

(Other definitions for rooks that I've seen before include "men on the board" , "Castles, also, in chess" , "Fleeces; chessmen" , "Overcharges" , "Collective name for them is a parliament" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app