Crossword Genius

Approaches snooker table but loses form? (4,2,3)

Ross

I believe the answer is:

goes to pot

'loses form?' is the definition.
(both can mean to decline in success or quality)

I cannot understand how the remainder of the clue works.

(Other definitions for goes to pot that I've seen before include "cracks up" , "Approaches the snooker table" , "Become ruined" , "Becomes bad" , "Prepares to follow snooker player" .)

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