Young seal (3)
I believe the answer is:
pup
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">young seal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pup that I've seen before include "Produce litter" , "Young dog as palindrome" , "Small palindromic dog" , "Young seal" , "Young of various animals" .)