Looking at the feed, it’s being inserted into the <description> tag:
<item>
<title>RCVYS Members Meeting</title>
<link>
https://www.rcvys.org.uk/wordpress/event/rcvys-members-meeting/
</link>
<comments>
https://www.rcvys.org.uk/wordpress/event/rcvys-members-meeting/#comments
</comments>
<pubDate>Wed, 15 Oct 2014 12:30:00 +0000</pubDate>
<dc:creator>
<![CDATA[ RCVYS ]]>
</dc:creator>
<guid isPermaLink="false">
https://www.rcvys.org.uk/wordpress/?post_type=tribe_events&p=626
</guid>
<description>
<![CDATA[
<p>This Members Meeting will be an opportunity to discuss a number of important topics.</p> <p>The post <a rel="nofollow" href="https://www.rcvys.org.uk/wordpress/event/rcvys-members-meeting/">RCVYS Members Meeting</a> appeared first on <a rel="nofollow" href="https://www.rcvys.org.uk/wordpress">RCVYS</a>.</p>
]]>
</description>
<wfw:commentRss>
https://www.rcvys.org.uk/wordpress/event/rcvys-members-meeting/feed/
</wfw:commentRss>
<slash:comments>0</slash:comments>
</item>
Can anyone help me find where to get rid of whatever code is adding this information to the description code? I’m looking at feed-atom.php right now but I’m not very good with PhP so not entirely sure what I’m looking at/for.
Cheers!