Blood vessels (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">blood vessels</span>' is the definition.<br/ ><span class="explanation-format__explanation">(vein is a kind of blood vessel)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for veins that I've seen before include "Circulation aids" , "Characteristic styles" , "Layers of ore" , "Blood vessels" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">blood vessels</span>' is the definition.<br/ ><span class="explanation-format__explanation">(artery is a kind of blood vessel)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for arteries that I've seen before include "Vessels that carry blood from the heart to the body" , "Blood vessels - major roads" , "Blood vessels leading from the heart" , "Major thoroughfares for important traffic" .)