This one is quite hard actually, you have to wear the "Fine Shirt" acessory while doing a side-job.
Fine Shirt is a rare loot from Melissa, you can find her after doing a couple of jobs in the Tavern. I recommend you to have the Lucky trait to increase your chances of getting the Fine Shirt recipe
Funny enough, I chose to see if I could beat her last night in my current run and I lucked out, got the new recipe and finally popped it! Now I just need to finish the museum off & massage game and then check out the latest update
