Ben points out Vi (5)
I believe the answer is:
nevis
'ben' is the definition.
(I have seen 'Highest Ben' mean 'nevis' so perhaps 'ben' could also mean 'nevis')
'points out vi' is the wordplay.
'points' becomes 'nes' (NE is an example).
'out' is an insertion indicator.
'nes' enclosing 'vi' is 'NEVIS'.
(Other definitions for nevis that I've seen before include "The principal ben" , "Ben -, highest British mountain" , "Ben ..... is highest mountain in Britain" , "Ben --, highest in UK" , "Ben -, highest Br. spot" .)