Newlyweds' trip (9)
I believe the answer is:
honeymoon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">newlyweds' trip</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 honeymoon that I've seen before include "Newlyweds' holiday" , "Post-reception break" , "Early period of goodwill" , "Sequel to marriage" , "romantic break" .)