I rather thought "best" as a verb was the definition - not that I can make the "top club" work.
For 8 I have a word that could mean suddenly and does convert to fit - but can't see why "even around ten" ....
I'm finding this less pleasurable and much harder work than usual geniuses ... the conversions seem quite random and one can't be sure one has the right one - they might have been made to fit into a theme to integrate the process and make it more satisfying.