The idea of display_template is to provide adp code which will define how the element will ve displayed, so tcl code is not allowed here ( as you may noticed :) ).
So.. one way to go is to extend the vars defined in your db_multirow, you can achive that by using the -extend switch ( check this out https://openacs.org/api-doc/proc-view?proc=db_multirow ).
One example could be something like this:
...
...
display_template {
...
@yourmultirow.name@
...
}
...
...
db_multirow -extend {name} yourmultirow yourmultirow_query { *SQL* } {
...
...
one::mydraft::get -item_id $item_id -array my_array
set name $my_array(name)
...
...
}
