Injection device (7)
I believe the answer is:
syringe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">injection device</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 syringe that I've seen before include "Injection device" , "Instrument to inject or withdraw fluid" , "Injecting device" , "Device for giving injections" , "Injection tool" .)