Cheer (for) (4)
I believe the answer is:
root
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cheer for</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for root that I've seen before include "Reptile" , "Origin - stem" , "Underground part of a plant" , "Basic cause or origin" , "support" .)