Pot starter (4)
I believe the answer is:
ante
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pot starter</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 ante that I've seen before include "Player's stake in poker - a ten? (anag)" , "Pre-deal stake" , "Stake put up before the deal" , "early payment" , "not post" .)