I dunno if it's the focus of any one specific issue (and looking at the scans I've got, it's not as explicit as I thought...)
But this is from Batgirl #7 - http://i.imgur.com/a80kxOY.jpg From some 101 type thing I think? - http://i.imgur.com/y67EgNt.jpg Vaguely relevant: "From this vantage point I can incapacitate a person in four hundred and sixty three different ways without drawing blood" - http://i.imgur.com/l2if8zy.jpg
Bonus Clark being amazing - http://i.imgur.com/eczT3ks.jpg
Re: Fill: Whoever Falls First -- Bruce/Clark, sparring (6/?)
But this is from Batgirl #7 - http://i.imgur.com/a80kxOY.jpg
From some 101 type thing I think? - http://i.imgur.com/y67EgNt.jpg
Vaguely relevant: "From this vantage point I can incapacitate a person in four hundred and sixty three different ways without drawing blood" - http://i.imgur.com/l2if8zy.jpg
Bonus Clark being amazing - http://i.imgur.com/eczT3ks.jpg