Input (12)
I believe the answer is:
contribution
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">input</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for contribution that I've seen before include "Gift" , "Something given towards a common purpose" , "Something given towards a common aim" , "given financial assistance" , "Input" .)