Rugby position (3,4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rugby position</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 fly half that I've seen before include "Footballer" , "Rugby player" , "eg Jonny Wilkinson" , "Rugby position" .)
(Another definition for number eight that I've seen is " forward".)