Infant's outfit (7)
(Other definitions for layette that I've seen before include "Kit for baby" , "Baby clothes and accessories" , "Provision for new baby" , "Outfit for a new baby" , "First outfit" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">infant's outfit</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for onesie that I've seen before include "One-piece full-body garment" , "Single-piece full body garment" .)