Silly mistake (4)
(Other definitions for boob that I've seen before include "Blunder (colloq.)" , "Mistake; breast (sl.)" , "Error" , "Slip" , "Embarrassing mistake" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">silly mistake</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 goof that I've seen before include "In slang, bungle or blunder" , "boob" , "Blunder, mistake (slang)" , "foolish error" , "(Make a) silly mistake" .)
(Other definitions for booboo that I've seen before include "mistake" , "Blunder" , "Error" , "Having got animated, bear" .)