Do, for example (4)
I believe the answer is:
note
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">do for example</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 note that I've seen before include "A piece of paper money" , "Tone of distinction" , "Record; memo" , "Brief letter - distinction" , "Pay attention to; record" .)