Oliver —; dance (5)
I believe the answer is:
twist
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">oliver</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">dance</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know this)</span><br/ ><br/ ></span>
(Other definitions for twist that I've seen before include "Rotate rapidly" , "Turn into a distorted shape" , "Unexpected event" , "Intertwine, contort" , "dance from the 60s" .)