Mama's boy (3)
I believe the answer is:
son
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mama's boy</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 son that I've seen before include "Express paper" , "Male descendant" , "Male scion" , "Male child" , "The kind of child" .)