Baby's toy (6)
I believe the answer is:
rattle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">baby's toy</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rattle that I've seen before include "Baby's toy - racket - disconcert" , "making one upset" , "Clink; disconcert" , "Baby's toy; sound of loose part" , "Make worried, baby's toy" .)