If you need to make changes to a post after it has been waiting for moderation, you will need to report the post to the moderators.
https://forum.oneclickchicks.com/announcement.php?a=8

Sometimes when I post, it shows a message that it will not be posted until admin approves it. How then do I get to check the content for the usual 15mins before that editing window closes, when I dont know when it will be posted by admin?