Believer in a god (6)
I believe the answer is:
theist
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">believer in a god</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 theist that I've seen before include "Believer in a creator god" , "Tithes for believer in God" , "One believes in the existence of a god or gods" , "Believer in god/gods" , "Person in good faith" .)