The crossword solution for the term 'A Worn Out Tree' is EDEN, which is a four-letter word. EDEN is a biblical reference to the Garden of EDEN, which was the paradise home of Adam and Eve in the Bible. It is also used to refer to a place of perfect happiness and innocence. In this context, the term 'A Worn Out Tree' could be referring to the Tree of Knowledge in the Garden of EDEN, which was the source of the original sin.