I didn’t understand the theme of this puzzle until after I had finished it (and looked in Orange’s blog). Can I blame lack of sleep for not getting something so obvious in retrospect? Note that half the letters in each theme answer (the ones in the second half of the answer) are circled in the grid.
3D, Digestive system parts with recycling? – INTESTINES
5D, Most promising options with recycling? - BESTBETS
7D, Took a risk with recycling? - STUCKONESNECKOUT
10D, Come back with recycling? – REAPPEAR
33D, Livery blacksmith with recycling? – HORSESHOER
41D, Imposition on drinking with recycling? – LEGALAGE
43D, Sports colleague with recycling? - TEAMMATE
The meaning of all the “with recycling”s? The letters in the second half of the answers are the same letters in the first half, anagrammed.