Link or connection (3-2)
I believe the answer is:
tie-up
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">link</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">connection</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for tie-up that I've seen before include "Link, connection" , "Link (between companies)" , "affiliation" , "Telecoms link" , "Bind" .)