[mikey1991]

Well, I think it would be something like this:

<vb:if condition="$post['fieldx']">{vb:raw post.fieldx}</vb:if>{vb:raw post.username}

So go to your ACP > User Profile Field Manager > Add New User Profile Field > Profile Field Type > Single Line Text Box > Fill out all the boxes, then note the FIELDID .. Ie, it will say something liek "field7" - then go to your ACP > Styles & Templates > Style Manager > YourStyle > Edit Templates > Postbit Templates > Postbit and find {vb:raw post.username} and add before it; <vb:if condition="$post['fieldx']">{vb:raw post.fieldx}</vb:if> - where the red x is changed to your fieldid..

This isn't tried or tested, but should work.

Of course, if you want the clan tag to be RED and inside ['s, change the code accordingly, IE;

<vb:if condition="$post['fieldx']"><span style="color:red;">[{vb:raw post.fieldx}]</span></vb:if>{vb:raw post.username}