Great, excellent (5)
I believe the answer is:
super
This clue is a double definition.
'great' is the first definition.
(I've seen this before)
'excellent' is the second definition.
(I've seen this before)
(Other definitions for super that I've seen before include "Top" , "Outstanding" , "Extremely good" , "of high quality" , "Marvellous, terrific" .)