Misbehave (3,2)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">misbehave</span>' is the definition.<br/ ><span class="explanation-format__explanation">(acting up is a kind of misbehaving)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for act up that I've seen before include "Informally, behave badly or cause trouble" , "Become unpleasant" , "Mess about" , "Behave like a brat" , "go wrong" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">misbehave</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 play up that I've seen before include "Be awkward" , "Be painful - misbehave" , "Malfunction" , "Emphasise the importance" , "make too much of a story" .)
(Another definition for actup that I've seen is " Behave in a troublesome way".)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">misbehave</span>' is the definition.<br/ ><span class="explanation-format__explanation">(as in a child acting out)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Another definition for act out that I've seen is " Represent an incident or state physically".)
(Other definitions for lets that I've seen before include "we shall serve them again!" , "Yes" , "Leases" , "Allows or causes to" , "Rents out or allows" .)