To ensure that all of the required parameters are being supplied, I would suggest that you use something like this.

In the remotes section:
Code:
menu nicklist {
  Clones : clone $1 $chan
}
alias -l clone {
  echo -a $ialchan($address($1,2),$2,1)
  echo -a $ialchan($address($1,2),$2,0)
}