Working with team in agreement (6)
I believe the answer is:
onside
'in agreement' is the definition.
(I've seen this before)
'working with team' is the wordplay.
'working' becomes 'on' (on can mean working or activated).
'with' says to put letters next to each other.
'team' becomes 'side' (both can mean a sports team).
'on'+'side'='ONSIDE'
(Other definitions for onside that I've seen before include "is in state to continue playing" , "Legally positioned at football etc" , "In agreement (colloq.)" , "Legally positioned on field" , "In a legal position (football)" .)