Pokes fun at (4)
I believe the answer is:
ribs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pokes fun at</span>' is the definition.<br/ ><span class="explanation-format__explanation">('rib' can be a synonym of 'poke fun at')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ribs that I've seen before include "Chest bones, tasty when spare" , "Curved bones around the chest" , "Arched bones in the upper body" , "Is making fun of" , "Makes fun of - bones" .)