Openly superior to group of directors? (5,5)
I believe the answer is:
above board
'openly' is the definition.
(above board can mean done fairly or openly)
'superior to group of directors?' is the wordplay.
'superior to' becomes 'above' (ranked above).
'group of directors?' becomes 'board' (board of directors).
'above'+'board'='ABOVE-BOARD'
(Other definitions for above board that I've seen before include "at the top of the table?" , "like a successful surfer?" , "Entirely honest" , "Legitimate, honest" , "Open and honest" .)