It's more than a hypothesis (6)
I believe the answer is:
theory
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">it's more than a hypothesis</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for theory that I've seen before include "Unproven explanation" , "Guess" , "General principles of a subject" , "Hypothesis, thesis" , "Supposition, set of ideas" .)