Crossword Genius

In game of cards Jack drops, followed by Queen, to give easy decision (2-7)

Ross

I believe the answer is:

no-brainer

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

'easy decision' is the definition.
(I've seen this in another clue)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for no-brainer that I've seen before include "That which must be done, obviously" , "Something requiring little thought" , "Something involving little or no mental effort" , "Obvious choice" , "Something requiring no mental thought" .)

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