Part of the general assembly, unfortunately (4)
I believe the answer is:
alas
'unfortunately' is the definition.
(I've seen this before)
'part of the general assembly' is the wordplay.
'part of' says the answer is hidden in the clue.
'ALAS' is hidden within 'general assembly'.
(Other definitions for alas that I've seen before include "Sadly, unfortunately" , "Expression of grief or misfortune" , "By bad luck" , "Proper, respectable" , "Regrettably, unfortunately" .)