Yes, that's it, Leon - maybe think cars? I's a lovely puzzle once you've worked it out, although for the second step you need to own a Brewers or use the link the out-of-date one given on the Wikipedia web page for Brewers (which is a damned sight easier to search if you pull up the HTML version).
Scores across six for two,down ten for one.
Replace the letters "one" in 17 down "toned" by the letters "ten". Replace the letters "two" reading across from the final letter of 16 across "ret" by the letters "six".