Come out east and join (6)
I believe the answer is:
emerge
'come out' is the definition.
(synonyms)
'east and join' is the wordplay.
'east' becomes 'e' (abbreviation).
'and' says to put letters next to each other.
'join' becomes 'merge' (I've seen this in another clue).
'e'+'merge'='EMERGE'
(Other definitions for emerge that I've seen before include "Come out or become known" , "Come out or transpire" , "Come into greater prominence" , "Rise to notice" , "Become known or apparent" .)