Misfortune in vestry? Aid being organised (9)
I believe the answer is:
adversity
'misfortune' is the definition.
(adversity is a kind of misfortune)
'vestry? aid being organised' is the wordplay.
'being organised' is an anagram indicator.
'vestry'+'aid'='vestryaid'
'vestryaid' anagrammed gives 'ADVERSITY'.
'in' is the link.
(Other definitions for adversity that I've seen before include "State of misfortune or affliction" , "Hard times or misfortune" , "Misfortune, hardship" , "Circumstances that cause trouble or sorrow" .)