lispdoc - results for define-setf-expander

(define-setf-expander access-fn lambda-list &body body)
Function: Syntax like DEFMACRO, but creates a setf expander function. The body of the definition must be a form that returns five appropriate values.
 Mentioned in:
HyperSpec - Macro DEFINE-SETF-EXPANDER
PCL - other ways to modify places