Phil, winning = landing as in winning/landing a prize and Ow! = That hurt! Putting the former around the latter means that it is 'belting' it, as in a trouser-belt.
Thanks, QM, I'd seen winning and "ow" but that was just too convoluted for my brain. Glad to see that the Times does NOT confuse winnowing with threshing.
Thanks a lot. :-)