Earthquake recorder (11)
I believe the answer is:
seismograph
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">earthquake recorder</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 seismograph that I've seen before include "Earthquake detector" , "Earthquake measuring instrument" , "Tremor detector" , "Earthquake recorder" , "What detects such tremors" .)