The unclued lights, two of two words, and including four pairs using two of the unclued lights twice, are of a kind.

Across

1 Metal-workers task expanded reportedly to include trophy (4-4)

11 Bill’s new car. Capital! (5)

13 A way to work out the last part of Hedda Gabler, possibly (7)

17 Patrols out with new steel breastplate (8)

21 Dark patches from red-top special getting loads of money (8)

23 Charladies had omitted mixing pastries (7)

25 Crust of bread, for starters.