Extensive in scope (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
broad
'extensive in scope' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for broad that I've seen before include "River expansion" , "extensive" , "Board (anag.)" , "not detailed" , "Catholic" .)