Seem to welcome tips from some expert peacemaker (8)
I believe the answer is:
'peacemaker' is the definition.
'seem to welcome tips from some expert' is the wordplay.
'seem' becomes 'appear' (synonyms).
'to welcome' means one lot of letters goes inside another (in sense of 'inviting in').
'tips from' says to hollow out the word (remove centre letters).
'some expert' becomes 'sage'.
'sage' with its centre taken out is 'se'.
'appear' enclosing 'se' is 'APPEASER'.
(Other definitions for appeaser that I've seen before include "One who gives in to demands for a quiet life" , "One who propitiates by concessions" , "one seeking peace and quiet" .)