Rose fruit (3)
I believe the answer is:
hip
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rose fruit</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 hip that I've seen before include "Swinging" , "Fruit of the dog-rose" , "Haunch" , "Fruits of wild rose" , "Following trends" .)