Wearying (6)
I believe the answer is:
tiring
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wearying</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that wearying can be written as tiring)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tiring that I've seen before include "Growing weary or bored" , "Wearisome" , "Becoming sleepy" , "Wearying, exhausting" , "Exhausting or tedious" .)