I'm still far behind on this one. 28d: WW1 enemy destroying British missile launch site. I have o*h*.
My instinct says Ochs but I can't find this enemy and know nothing about the site.
Then let's try 7d. Queen observed king must eat crow.
Got *q****. Help?
15 across. Bad food queen swallows right for dog. T*a****. Can't think of a word for food that helps.