Management shows excellent creativity (11)
I believe the answer is:
supervision
'management' is the definition.
(supervision is a kind of management)
'excellent creativity' is the wordplay.
'excellent' becomes 'super' (I've seen this in other clues).
'creativity' becomes 'vision' (vision is a kind of creativity).
'super'+'vision'='SUPERVISION'
'shows' is the link.
(Other definitions for supervision that I've seen before include "Oversight" , "Control" , "provided by the boss" .)