Suckling site (4)
I believe the answer is:
teat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">suckling site</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 teat that I've seen before include "Piece on baby's bottle" , "essential for babies" , "Nipple or dug" , "Part of feeding bottle" , "Bulb on infant's bottle" .)