Everything four in siege did and said (7)
I believe the answer is:
alleged
'said' is the definition.
('allege' can be a synonym of 'say')
'everything four in siege did' is the wordplay.
I cannot really understand how this works, but
'everything' could be 'all' (all things) and 'all' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'and' acts as a link.
Can you help me to learn more?
(Other definitions for alleged that I've seen before include "Deal leg (anag.)" , "Declared without being able to prove" , "Doubtful; claimed" , "Claimed (without proof)" , "Asserted - unproven" .)