Admission, access (5)
I believe the answer is:
entry
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">admission</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">access</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that entry is a type of access)</span><br/ ><br/ ></span>
(Other definitions for entry that I've seen before include "all runners" , "Access point" , "Competitor" , "field" , "Gate" .)