Something easy to do (1,4,2,3,4)
I think it could be either:
a walk in the park
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">something easy to do</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 a walk in the park that I've seen before include "enjoyed by the setter?" , "passing through Tivoli Gardens?" , "A piece of cake" , "Plain Sailing'" , "A breeze" .)
(Other definitions for childs play that I've seen before include "Peter Pan, say, on stage" , "A doddle" , "simple task" , "no problem" , "Something very easy to do" .)