Superior skill keeps Josh's associate at table (8)
I believe the answer is:
arrogant
'superior' is the definition.
(I've seen this before)
'skill keeps josh's associate at table' is the wordplay.
'skill' becomes 'art' (both can mean a talent).
'keeps' indicates putting letters inside.
'josh's associate at table' becomes 'Rogan' (as in a rogan josh curry).
'art' going around 'rogan' is 'ARROGANT'.
(Other definitions for arrogant that I've seen before include "Overbearing with exaggerated sense of superiority" , "Overweening" , "Overly self-important" , "Having an exaggerated sense of one's own importance" , "Over-cocky" .)