Scope or extent (5)
I believe the answer is:
ambit
I believe this is a double definition.
'scope' is the first definition.
(synonyms)
'extent' is the second definition.
(ambit is a kind of extent)
(Other definitions for ambit that I've seen before include "round" , "Limits" , "Range, scope" , "Scope or confines" , "Circuit, compass" .)