Close with a bang (4)
I believe the answer is:
slam
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">close with a bang</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for slam that I've seen before include "Criticise - bang - very good result at bridge" , "Taking of twelve or thirteen tricks (bridge)" , "Ambitious contract" , "big contract" , "Report of forcefully closing" .)