Surrounded by part of team on green (5)
I believe the answer is:
among
'surrounded by' is the definition.
(I've seen this before)
'part of team on green' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'AMONG' can be found hidden inside 'team on green'.
(Other definitions for among that I've seen before include "In the number of" , "Included with - inside" , "No mag (anag.)" , "Go man! (anag.)" , "Together with" .)