Exceptionally wide, for example (5)
I believe the answer is:
extra
I believe this clue is a double definition.
'exceptionally' is the first definition.
(thesaurus)
'wide for example' is the second definition.
(a wide is a type of extra in cricket)
(Other definitions for extra that I've seen before include "Ancillary" , "someone acting in a crowd" , "Bit actor in film" , "Actor in crowd scene, no lines" , "Not a standard item" .)