Painful experience (6)
I believe the answer is:
ordeal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">painful experience</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 ordeal that I've seen before include "severe test shows" , "Long painful experience" , "Long, unpleasant experience" , "Tough test in Laredo" , "Torture" .)