Documents to be filled in (5)
I believe the answer is:
forms
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">documents to be filled in</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for forms that I've seen before include "Shapes" , "beds for animals" , "Benches" , "Takes shape" , "Documents to be filled in" .)