Part of a contract
I believe the answer is:
clause
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">part of a contract</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for clause that I've seen before include "Grammatical division" , "Separate section of a legal document" , "Bill's article" , "Separate item in contract" , "Subunit of a sentence" .)