School does something to get mutual agreements (8)
I believe the answer is:
compacts
'mutual agreements' is the definition.
(a compact is a type of deal or agreement)
'school does something' is the wordplay.
'school' becomes 'comp' (short for comprehensive school).
'does something' becomes 'acts' ('act' can be a synonym of 'do something').
'comp'+'acts'='COMPACTS'
'to get' acts as a link.
(Other definitions for compacts that I've seen before include "cosmetics cases" , "Agreements or containers for face powder" .)