Crossword Genius

Where Rugby Union needs to go to make it break out is silly (5)

Ross

I believe the answer is:

inept

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

I cannot understand how the rest of the clue works.

(Other definitions for inept that I've seen before include "Awkward, showing no skill" , "Not competent" , "Clumsy - silly" , "Unsuitable, clumsy" , "Maladroit" .)

I've seen this clue in The Independent.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.