Chinese exercise system (3,3)
I believe the answer is:
tai chi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">chinese exercise system</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tai chi that I've seen before include "'Chinese form of slow physical exercise (3,3)'" , "'Chinese meditation involving slow physical exercise (3,3)'" , "Chinese system of slow exercise for relaxation, balance and health" , "Chinese martial art and system of callisthenics" , "Chinese exercises" .)