DJ-Catalog2 - Custom Field plugin allows to embed custom field into product's description, e.g.:

- {djc2customfield color} - displays custom field which alias equals to 'color'.
- {djc2customfield specification label="0" unset="0"} - displays custom field which alias equals to 'specifiation', hides its label and allows the attribute to be displayed in standard extra fields table

 

This plugin comes free with the subscription of the extension.
You'll find it installed (you may need to enable it manually) after extension's installation, alternatively it's available in downloads section (available for active subscribers).