Press the Maori to intercede (7)
I believe the answer is:
mediate
'to intercede' is the definition.
('mediate' can be a synonym of 'intercede')
'press the maori' is the wordplay.
'press' becomes 'media' (the press is part of the media).
'the maori' becomes 'te' (I've seen this in other clues).
'media'+'te'='MEDIATE'
(Other definitions for mediate that I've seen before include "Act between parties to reconcile differences" , "Help resolve a dispute" , "Arbitrate between parties in dispute" , "try to resolve dispute" , "Help settle a dispute" .)