Learned it's true I'd gone out East (7)
I believe the answer is:
erudite
'learned' is the definition.
(synonyms)
'true i'd gone out east' is the wordplay.
'gone out' indicates anagramming the letters.
'east' becomes 'e' (synonyms).
'true'+'id'='trueid'
'trueid' with letters rearranged gives 'erudit'.
'erudit'+'e'='ERUDITE'
'it's' acts as a link.
(Other definitions for erudite that I've seen before include "Well educated, having great learning" , "Having deep knowledge" , "Learned and scholarly" , "Rude tie (anag.)" , "Well read" .)