Additionally wide, say? (5)
I believe the answer is:
extra
This clue could be a double definition.
'additionally' is the first definition.
(thesaurus)
'wide say?' is the second definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
Can you help me to learn more?
(Other definitions for extra that I've seen before include "unused" , "Bit-part actor" , "One has no lines" , "Bit part actor" , "additional supplies" .)