What I end up doing is this:

In my .tcshrc file (which is also "sourced" on every tcsh invocation
under my current version, 6.08.00), I have the following:
  source $HOME/.alias

Then, in $HOME, I have a file called .alias, which contains all of my
alias definitions.  I find this eaiser for managing them, and moving
from machine to machine, where I may want my .tcshrc file different,
or where I may be restricted in the shell I can use.

-Sean
--
Sean Matheis  (sean@pentex.org) ICQ: 1276699  
"Bother," said Pooh.
"Eeyore, ready two photon torpedos and lock phasers on the Heffalump."
"Piglet, meet me in transporter room three."