I Used a more sophisticated approach like a high end brand. with the 'tc" together. and then I added a crown and the rays of light. and a an Outline of a t-shirt, so clients can tell that it has something to do with t-shirts.
So I was playing around with the high end feel. since I got the feeling you wanted it to be like "couture".....so i made a seal. with the Tshirt and the the previous "TC". i did with a different placement.
I went back and read the content brief and i saw that you had a slight preference to the feminine side of logo that you wanted. So i played around with the seal concept. the Leaves or flowers i drew if you can see it makes a slight heart. and then focused on the detail, still playing around with a sophisticated look..i also have it in pink...but you can do like a boy girl type thing?