A ticket provides it (5)
I believe the answer is:
entry
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a ticket provides it</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for entry that I've seen before include "Competitors - way in" , "Gate" , "field" , "candidate" , "Doorway" .)