Stop talking (4,2)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stop talking</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for clam up that I've seen before include "Refuse to talk like large shellfish?" , "Abruptly stop talking (colloq.)" , "Stop giving out" , "'Fall silent and refuse to talk (4,2)'" , "Keep mum" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stop talking</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pipe down that I've seen before include "make less noise" , "Stop talking" , "Shut up!" , "Be quiet!" , "Say no more!" .)
(Other definitions for hush that I've seen before include "Make or become silent or quiet" , "Soothe" , "Mum's the word" , "Make (someone) quiet" , "Noiselessness" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stop talking</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for put a sock in it that I've seen before include "Keep mum" , "Quiten down" , "Stop endless yacking" , "Shut up!; tuition packs (anag.) (3,1,4,2,2)" , "Stop talking (3,1,4,2,2)" .)
(Another definition for give it a rest that I've seen is " Stop doing that!".)