Unwelcome gift (5,8)
I believe the answer is:
white elephant
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unwelcome gift</span>' is the definition.<br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for white elephant that I've seen before include "liability" , "conspicuous failure" , "Troublesome or useless possession" , "It gives more trouble than it's worth" , "Expensive, unwanted item" .)