Lack of belief (7)
I believe the answer is:
atheism
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lack of belief</span>' is the definition.<br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for atheism that I've seen before include "Sceptic's position" , "Disbelief in gods" , "A lack of faith" , "Lack of belief in the existence of God" , "Disbelief in a god" .)