Pushchair (4,5)
I believe the answer is:
baby buggy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pushchair</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for baby buggy that I've seen before include "early transport system that collapses" , "One's first wheels?" .)