Everything depends on your needs, Whatever you need, you will get in Delhi. Since you are looking for an online tailor then it will not depend on your current location in Delhi and I can say that you will find lots of ladies tailor online in Delhi.
Now I would prefer you a better option here. Instead of visiting any shop and investing your whole day to find the best tailor shop in your area, you can simply call visit the website HIRA TAILORS or you can simply call their team from anywhere in Delhi. Their team members will visit your doorstep and you can have everything whatever you need from a tailor shop at your home.