Unusually wide, say (5)
I believe the answer is:
extra
This might be a double definition.
'unusually' is the first definition.
(extra can mean to an unusual degree)
'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 "outside" , "Superfluous" , "Bit actor in film" , "Run scored but not off the bat" , "Run; in addition" .)