Prophet, clairvoyant (4)
I believe the answer is:
seer
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">prophet</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(both can mean someone who tells the future)</span><br/ ><br/ >'<span class="explanation-format__original">clairvoyant</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for seer that I've seen before include "One divines the future" , "I envisage" , "One who knows the future" , "Person who can read the future" , "Person with unusual powers of foresight" .)