Bring on board
I believe the answer is:
hire
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bring on board</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hire that I've seen before include "Rent or lease" , "Pay for temporary use" , "Rent, employ" , "Pay to use something" , "Employ (for wages)" .)