gistfile1.php

<?php
    function theme_custom_post_type() {
        $labels = array(
            'name'             => _x( 'Clues', 'post type general name' ),
            'singular_name'    => _x( 'Clue', 'post type singular name' ),
            'add_new'          => _x( 'Add', 'book' ),
            'add_new_item'     => __( 'Add clue' ),
            'menu_name'        => __( 'Clues' )
        );
        $args = array(
            'labels'        => $labels,
            'description'   => 'Clue details page',
            'public'        => true,
            'menu_position' => 5,
            'supports'      => array( 'title', 'editor', 'thumbnail', 'excerpt', 'comments', 'revisions', 'author' ),
            'has_archive'   => true
        );

        register_post_type( 'clue', $args );
    }
    function theme_custom_taxonomy() {
        $labels = array(
            'name'              => _x( 'Clue categories', 'taxonomy general name' ),
            'singular_name'     => _x( 'Clue category', 'taxonomy singular name' ),
            'menu_name'         => __( 'Clue categories' )
        );
        $args = array(
            'labels'            => $labels,
            'show_admin_column' => true,
            'hierarchical'      => true
        );
        register_taxonomy( 'clues', 'clue', $args );
    }

    add_action( 'init', 'theme_custom_taxonomy' );
    add_action( 'init', 'theme_custom_post_type' );