Get up late (3-2)
I believe the answer is:
lie-in
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">get up late</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 lie-in that I've seen before include "time spent with crossword, perhaps" , "Extended sleep" , "Extra snoozing" , "That extra hour or so in bed?" , "Extra time in bed" .)