Put up with, bear (6)
I believe the answer is:
endure
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">put up with</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">bear</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(both can mean to tolerate)</span><br/ ><br/ ></span>
(Other definitions for endure that I've seen before include "Persist over time" , "Put up with, say hardship" , "Last or tolerate" , "Go through" , "brook" .)