Be careful (4,3)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">be careful</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 look out that I've seen before include "A view of the future" , "as Wenceslas did" , "Be on your guard!" , "Take care" , "Beware!" .)
(Other definitions for play safe that I've seen before include "Avoid risk" , "Act cautiously" , "Body of church" , "Don't take risks - its only a game?" , "Avoid taking risks - in game?" .)