If you want to display a string without the quotes, use "disp" instead of "write".
If you want to convert a string into an S-expr, use "read", and then if you want to evaluate that expression, use "eval".
(eval (read "(cons (cons 1 2) 3)"))
But I'm pretty sure you don't want to do either of those in this case. If what you want is nested lists, generate the nested lists - Lisp is good at that. Don't try to piece together your code out of parentheses. The following code will more-or-less generate the nested lists you asked about:
(def xw (n)
(let l '()
(for x 1 n
(= l (join 'w/link (list l))))
l))
However, the other problem with your approach is that even if you get xv working, it will pass a quoted expression to defop instead of an expression, and defop won't work right. To generate code, you need a macro, not a function. Here's a macro that will solve your original problem:
