Form of football (6)
I believe the answer is:
soccer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">form of football</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that soccer is a type of football codes)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for soccer that I've seen before include "Ball game" , "Association football" , "Informally, game" , "Roy Keane's game" , "Football for Americans?" .)