Physical training (3)
I believe the answer is:
fly
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">physical training</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that Fly is a physical training)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for fly that I've seen before include "Soar; hurry" , "Run away; smart (colloq.)" , "Move through air" , "Insect; go quickly" , "Flee" .)