Stop looking and read docs :)

From the test

{ # make a select field with AoA options
  my ($html, $tree) = widget(select => {
    options => [
      [ ''    => 'Flavorless',     ],
      [ minty => 'Peppermint',     ],
      [ perky => 'Fresh and Warm', ],
      [ super => 'Red and Blue',   ],
    ],
    name  => 'flavor',
    value => 'minty',
  });
[download]

for you to try

{

  my $factory = HTML::Widget::Factory->new();

  my $html = = $factory->combo({
    id => 'required',
    options => [
      [ ''    => 'Flavorless',     ],
      [ minty => 'Peppermint',     ],
      [ perky => 'Fresh and Warm', ],
      [ super => 'Red and Blue',   ],
    ],
    name  => 'flavor',
    value => 'minty',
  });
[download]