Surrounded by, in the middle of (4)
I believe the answer is:
amid
I believe this clue is a double definition.
'surrounded by' is the first definition.
(amid means among or surrounded by)
'in the middle of' is the second definition.
(I've seen this in another clue)
(Other definitions for amid that I've seen before include "Amongst" , "In the thick of" , "In the middle of" , "Among" , "Maid (anag)" .)