Pierce, puncture (5)
I believe the answer is:
prick
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">pierce</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(pricking is a kind of piercing)</span><br/ ><br/ >'<span class="explanation-format__original">puncture</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for prick that I've seen before include "Pierce" , "Puncture" , "Stab with a needle" , "Touch with a needle" , "spur" .)