One hundredth of a euro (4)
I believe the answer is:
cent
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one hundredth of a euro</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 cent that I've seen before include "One-hundredth of the value of the basic unit" , "One-hundredth of the basic monetary unit" , "1/100 of various currencies" , "One hundredth of a euro" , "Fractional monetary unit" .)