Bicycle made for two (6)
I believe the answer is:
tandem
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bicycle made for two</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tandem that I've seen before include "Two-person bicycle" , "Bicycle-built-for-two" , "Two-seat bicycle" , "Bike for two cyclists" , "Bicycle made for two" .)