Crossword Genius

Kid is one making bishop look small and stupid (5)

Ross

I believe the answer is:

silly

'stupid' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for silly that I've seen before include "Idiotic" , "near the batsman" , "Stupid" , "Inane; very close (fielder)" , "Ludicrous, foolish" .)

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