Perambulator (4)
I believe the answer is:
pram
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">perambulator</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pram that I've seen before include "Ramp for a baby buggy" , "Baby vehicle" , "Baby transport" , "lighter" , "Cargo-boat" .)