The Free On-line Dictionary of Computing (30 December 2018):

Conversational LISP

    (CLISP) A mixed English-like, ALGOL-like surface
   syntax for Interlisp.

   ["CLISP: Conversational LISP", W. Teitelman, in Proc Third
   Intl Joint Conf on AI, Stanford, Aug 1973, pp.686-690].

   (1994-11-01)