getting 'clear' to work in Emacs shell

[Jeff Rancier <jbrancier at yahoo dot com>]

GNU Emacs 21.3.1 (i386-msvc-nt5.1.2600) of 2003-03-27 on buffy
GNU bash, version 3.2.51(24)-release (i686-pc-cygwin)
CYGWIN_NT-5.1 1.7.7(0.230/5/3) 2010-08-31 09:58
Microsoft Windows XP Pro - Version 2002, SP3

The 'clear' work's  in a Cygwin Bash session,

C106426@USLINY2R86KRP8 ~
$ alias  clear
alias clear='cat ~/.cls'

C106426@USLINY2R86KRP8 ~
$ less  .cls
ESC[2J
.cls (END)

But doesn't  within Emacs:

C-z runs the command  shell
   which is an interactive compiled Lisp function in `shell'.
(shell  &optional BUFFER)

All I get within an  Emacs shell session is the following, without clearing the 
screen.  Is there  some envionment variable I need to set here?


bash-3.2$  clear
[2J
bash-3.2$


      

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