Crossword Genius

Card player a brute, knocking bishop out (4)

Ross

I believe the answer is:

east

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

'card player' is the definition.
(bridge players are known by compass position)

'a brute knocking bishop out' is the wordplay.
I cannot really see how this works, but
'a' is within the answer.
The remaining letters 'est' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for east that I've seen before include "Airport near Derby" , "Opposite of west" , "E" , "Sunrise direction" , "One of four at table" .)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app