Lost one's balance? (5)
I believe the answer is:
spent
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lost one's balance?</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 spent that I've seen before include "Worn out having paid out money." , "Used up; exhausted" , "Exhausted, having paid money?" , "Worn out - after shopping?" , "Paid out - finished" .)