Labourers (7)
I believe the answer is:
navvies
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">labourers</span>' is the definition.<br/ ><span class="explanation-format__explanation">(navvy is a kind of labourer)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for navvies that I've seen before include "Van's I've found full of manual road workers" , "Labourers working on the roads" , "Construction labourers" .)