A pacifist finally in position to pacify (7)
I believe the answer is:
placate
'pacify' is the definition.
('placate' can be a synonym of 'pacify')
'a pacifist finally in position' is the wordplay.
'finally' suggests the final letters.
'in' indicates putting letters inside.
'position' becomes 'place' ('place' can be a synonym of 'position'**).
The final letter of 'pacifist' is 't'.
'a'+'t'='at'
'at' placed within 'place' is 'PLACATE'.
'to' acts as a link.
(Other definitions for placate that I've seen before include "Mollify, calm down" , "Calm, pacify, appease" , "Mollify, appease" , "Make calm, conciliate" , "Pale cat could pacify" .)