You can only claim for clothes used for work ie lingerie, fantasy costumes.
Yes all escort advertising can be put against your tax. Other expenses to be claimed are hotels (if you use them for incalls), work toil tires, condoms, sex toys, Travelling such as train fares.
I also claim for my car expenses such as fuel, car repairs and even the initial cost of the car. I use the car 75% for work so i an claim 75% of the cost of fuel, car repairs etc
I would advise you get an accountant as for a few hundred pounds they can literally save you thousands!