Game played on a lawn (7)
I believe the answer is:
croquet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">game played on a lawn</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for croquet that I've seen before include "Ball-game" , "Game which involves driving balls through hoops" , "Game with wooden balls, mallets and hoops" , "... or possibly at this ball game" , "Lawn sport" .)