Daze, stupefy (4)
I believe the answer is:
stun
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">daze</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that daze can be written as stun)</span><br/ ><br/ >'<span class="explanation-format__original">stupefy</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that stupefy can be written as stun)</span><br/ ><br/ ></span>
(Other definitions for stun that I've seen before include "Shock, flabbergast" , "Daze or bewilder" , "Shock into silence" , "Make dazed or numb" , "'Shock, daze (4)'" .)