Arrow part (5)
I believe the answer is:
shaft
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">arrow part</span>' is the definition.<br/ ><span class="explanation-format__explanation">('shaft' is part of 'arrow')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for shaft that I've seen before include "Vertical passageway, into a mine say" , "Spear handle; ray of sun" , "Vertical mine access" , "Vertical excavation" , "Long rod or column of light" .)