A running fortress generates a lot of trash. I think most/all items should have a sink that removes them, perhaps except very good trade goods. I use the atom smasher, but it is contra intuitive and hacky
Some ideas:
Incinerator. Consumes fuel, burns trash, produces ash. Options for what the operator should collect (auto? trading-like interface? Limit distance?). Wooden items can be used as fuel.
Butchering products eaten by carnivores. I get that more detailed feeding systems are in the pipeline in a longer perspective. How about an inbetween fix where dogs/bears/etc eat non-meat butchering products? Or you can set up someone to feed it to the dogs, perhaps even for a morale boost for their owner. If you want to be gruesome.. I wonder what goblin tastes like.
Some ideas for clothes, can be balanced by making raw cloth rarer in caravans, and perhaps worn clothning less valuable.
Rag rugs! "Fillerye" is traditional in Scandinavia, weaving spent cloth into thick rugs. Add "Weave rag rug" job at the loom, that produces rugs. Perhaps let the rugs have a text with "contains X masterwork clothes, the best is : text", for some history. Dwarves will pick up the rugs like clothes, and put them on their beds/rooms/cabinets whatever is easiest, for a morale boost.
Mend clothes: Add "mend cloths" option at the clothier. Worn clothes will either break into nothing, or get the text "this item has been mended", and be as new.