Hitch (a lift) (5)
I believe the answer is:
thumb
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hitch a lift</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for thumb that I've seen before include "Hitch-hiking digit" , "Digit (used for making a hitch?)" , "One opposed to other manual workers" , "Big digit" , "First digit" .)