Clearing an entry field

I'd like to be able to clear a fill-in-the-blank entry field upon re-entry to the page.Currently we can display the question and the entry field. Once the field is filled and a response is generated ( a text field appears) the user can jump to a review page. However when they go back to the original quation page, the value they entered in the entry field remains. Any suggestions on how we can clear it?tnx

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