Bind is a replacement for let*, destructuring-bind and multiple-value-bind. An example is probably the best way to describe its syntax:

(bind ((a 2)
((b &rest args &key (c 2) &allow-other-keys) '(:a :c 5 :d 10 :e 54))
((:values d e) (truncate 4.5)))
(list a b c d e args))

Simple bindings are as in let*. Destructuring is done if the first item
in a binding is a list. Multiple value binding is done if the first item
in a binding is a list and the first item in the list is ':values'.