Appear from East and combine (6)
I believe the answer is:
emerge
'appear' is the definition.
(emerge can mean to appear or arrive)
'east and combine' is the wordplay.
'east' becomes 'e' (synonyms).
'and' means one lot of letters go next to another.
'combine' becomes 'merge' (synonyms).
'e'+'merge'='EMERGE'
'from' acts as a link.
(Other definitions for emerge that I've seen before include "Materialize" , "Come into view" , "Break out (from an egg)" , "Come out or become known" , "Move out and become visible" .)