Reddit RSS feed with filter to filter out flair?

Is there a way to edit a Reddit RSS feed in a way that would remove posts with certain flair? Unfortunately the Intelligence trainer doesn’t pickup Reddit flair.

For example: You follow a subreddit about cooking, but don’t want posts with a the “appetizer” flair, but no one uses the word appetizer in the in the title or body of the post, only the flair designation.

edited to be more specific