Everton vacated ground somewhere in London (7)
I believe the answer is:
enfield
'somewhere in london' is the definition.
(a borough of London)
'everton vacated ground' is the wordplay.
'vacated' says to hollow out the word (remove centre letters).
'ground' becomes 'field' (field is a kind of ground).
'everton' with its centre removed is 'en'.
'en'+'field'='ENFIELD'
(Other definitions for enfield that I've seen before include "London suburb" , "Big centre" , "NE London borough" , "North London borough" , "Feel din of Kildare town" .)