How to call a referenced lambda?

I’m trying to call a function (lambda) stored within an alist. Below is a small snippet that demonstrates what I’m trying to do:

(defvar *db* '((:add (lambda (a b)
                       (+ a b)))
               (:sub (lambda (a b)
                       (- a b)))))

(defun perform-operation-on-numbers (operation a b)
  "Performs specified operation on the supplied numbers."
  (let ((func (second (find operation
                            *db*
                            :key #'car))))
    ;; TODO: Call `func` on `a` and `b`
    (print func)))

(perform-operation-on-numbers :add 1 2)

No matter what I do, not even funcall is able to let me call the lambda stored against :add. How should I reference the retrieved lambda as a lambda?

>Solution :

That’s not a function: it’s a list beginning (lambda ...). If you want a function have a function, for instance by

(defvar *db* `((:add ,(lambda (a b)
                        (+ a b)))
               (:sub ,(lambda (a b)
                        (- a b)))))

or, better, don’t wrap the thing in some useless baggage:

(defvar *db* `((:add ,#'+
               (:sub ,#'-))