Ealing turned out to be cheerful (6)
I believe the answer is:
genial
'be cheerful' is the definition.
(I've seen this before)
'ealing turned out' is the wordplay.
'turned out' is an anagram indicator (turn out can mean to organise).
'ealing' with letters rearranged gives 'GENIAL'.
'to' acts as a link.
(Other definitions for genial that I've seen before include "Cheerful and kindly" , "Angel I found being affable" , "Cordial" , "Agreeable in Ealing" , "'Cheerful, friendly, sociable (6)'" .)