Excuse me! (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">excuse me</span>' is the definition.<br/ ><span class="explanation-format__explanation">(both might be said to get someone's attention)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ahem that I've seen before include "Half-cough to draw attention" , "Polite noise to draw attention" , "Throat-clearing noise?" , "attention-seeker?" , "It attracts attention" .)
(Other definitions for what that I've seen before include "Eh?" , "I beg your pardon" , "Word used in a question" , "Interrogatory word" , "That which - come again!" .)
(Other definitions for oops that I've seen before include "Silly me, I've dropped something!" , "Oh dear, that's a mistake!" , "Exclamation on making obvious mistake" , "I've messed up" , "Something's been spilt!" .)
(Other definitions for pardon that I've seen before include "indulgence" , "Forgive the polite interruption" , "Forgiveness - I beg yours" , ""I'm sorry, could you say that again?"" , "Forgiveness for an offence" .)