With little warning (2,5,6)
I believe the answer is:
at short notice
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">with little warning</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 at short notice that I've seen before include "With little time for preparation" , "With little advance warning" .)