Question
My neighbor has a tree that leaves look alot like
Ash tree but it has clusters of seeds like fussy
berries that are greenish yellow. Can you identify the tree? We live in Northern Illinois
suburb of Chicago.

Answer
From what you discribe I can not ID this tree but I would suggest you call the Chicago Botanical Gardens and ask them. They will be able to ask questions about the tree and be better able to help. Thier contact web link is:
 http://www.chicago-botanic.org/index.html