Getting ancestors for manually set parent in template I have a a few pages outside of a structure but I want to display a breadcrumb for it as part of a structure. I am currently setting the parent page like so:
{% set parent = craft.entries.section('pages').slug('phone-directory') %}

{{ parent.ancestors }}

But when I loop through to get the ancestors it is only getting the current parent not all ancestors? Any idea how to achieve this?

The structure is
Staff
 &nbsp;&nbsp;&nbsp;&nbsp;Phone Directory

The reason I am trying to do this, is the 3rd level pages are either category pages or is a single with some specific routes. I want to manually set the real parent in the template, so I can get the ancestors for the breadcrumb trail as though it is part of the same section.

How can I manually set the parent entry in the template and get the ancestors from this entry?

**** UPDATED ****
This is an update on the above to show my exact code and what isn't working and How I expect it work...If anyone ca shed some light?

So by default I am getting my breadcrumbs like so;

{% if entry is defined and entry.section.handle != 'homepage' %}
{% set crumbs =  parent.ancetors ?? entry.ancestors|default([]) %}
{% set crumbDivider = '&lt;li&gt;&lt;span class="mx-3 text-grey text-xs"&gt;/&lt;/span&gt;&lt;/li&gt;' %}
&lt;nav class="mb-8 mx-6"&gt;
  &lt;ul class="list-reset flex flex-wrap items-center text-grey-dark text-sm"&gt;
    &lt;li class="mr-3 text-xs text-grey-light"&gt;You are in:&lt;/li&gt;
    &lt;li&gt;&lt;a href="{{ siteUrl }}"&gt;Home&lt;/a&gt;&lt;/li&gt;
    {% for crumb in crumbs %}
    {{ crumbDivider|raw }}
    &lt;li&gt;{{ crumb.getLink() }}&lt;/li&gt;
    {% endfor %}
    {{ crumbDivider|raw }}
    &lt;li class="text-grey-darker"&gt;{{ entry.title ?? category.title }}&lt;/li&gt;
  &lt;/ul&gt;
&lt;/nav&gt;
{% endif %}


This works as expect for normal standard entries. For example, within my Pages structure I have a parent of News with a Child of Internal News and on the Internal News page, the breadcrumb is reflected as;
Home / News / SWH Internal News

Now on the news entry pages I want the breadcrumb to read as follows;
Home / News / SWH Internal News / {{ Entry Title }}

I thought by setting the parent on the news/_entry.html template to the SWH Internal News page like so;
{% set parent = craft.entries.section('pages').slug('archive') %}

Would then give me the ancestors of News / SWH Internal News but instead it only outputs SWH Internal News.
As @Robin Schambach said, you need to loop through the ancestors.

{% set parent = craft.entries.section('pages').slug('phone-directory') %}
{% for ancestor in parent.getAncestors() %}
    {{ ancestor.title }}
{% endfor %}


This won't output the Phone Directory entry since you're just looping through its ancestors. So to complete the breadcrumbs you'll need to add 
{{ parent.title }} after the loop.