21 Across, Competing in a 8 goal draw in arena?(9) R?V?????
6 Down, Function of pool mainly malfunctioning (10) ???T???I??
19 Down, Note,it could contain more than one kind of note(8) R??????
24 Down, Small Island where a lot of cloth is found?(4) I???
24 down. The clue has "lot" inside "c lot h", hence lot is to be found in ch, and inch is a small island.
14 down is clever. It runs: Sets fire to to weed "c". The solution is light speed, obtained from lights and peed, c being the speed of light in the famous equation.