OK I answered my own question based on one of my old writeups. It IS possible to eliminate the temporary variable by coding as follows:
use strict;
my %h; #Pre-declare so it can be referenced inside populating code
%h=( HELP => sub {print qq(help\n)},
'?'=>sub{$h{HELP}()},
SAVE=>sub{print qq(save\n)},
EXIT=>sub{$h{SAVE}()} );
$h{'?'}();
$h{EXIT}();
This prints the lines:
help
save
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