Superb penalty (4)
I believe the answer is:
fine
This clue is a double definition.
'superb' is the first definition.
(thesaurus)
'penalty' is the second definition.
(I've seen this before)
(Other definitions for fine that I've seen before include "Sheer or very good" , "nice > brandy" , "Cash penalty - OK" , "No special brandy" , "Very thin - excellent?" .)