A user at my site can offer to delete an article, she can add an explanation to her deletion proposal if she feels her proposal isn't clear enough.
The message for asking for an explanation would be:
"If you feel an explanation is (in order?), please provide one:"
[and here comes a text-box for providing an explanation]
Replacing that message with:
"If you feel your deletion proposal isn't clear enough, please provide one:"
sounds awkward in its context.