back in(to) (the) harness
Resuming one's daily work. I'm not thrilled to get back into the harness on Monday. When do you get back in harness after your trip?
*back in(to) (the) harness
Fig. back doing one's job. (*Typically: be ~; get ~.) I don't look forward to getting back into the harness next Monday. When my vacation is over, I have to get back into harness the very next day. I'm not looking forward to having to get back in harness after my trip abroad.