Lab experiments (5)
I believe the answer is:
tests
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lab experiments</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tests that I've seen before include "Major cricket matches" , "Trials, exams" , "Trials to see if something works" , "International cricket matches" , "Puts to proof at cricket matches" .)