Testosterone can make it grow, but there can be other âside effectsâ from taking it, which you may or not like or be good for you. Talk to your doc first so you understand all the possible effects
Injecting testosterone has a lot of side effects (or just effects depending on your goal,) but there are other options. A testosterone cream or gel can be applied to the clit directly to get growth there without very much being absorbed into the bloodstream, so the effects stay local in most cases. Some women do this to enhance sex drive / responsiveness of their clit as well. And in some countries you can get a DHT gel, also applied to the clit directly for growth, although IIRC this is no longer available in the USA. DHT = dihydrotestosterone, a testosterone analogue that is more potent, so you need a smaller amount - which can be helpful if you are applying it directly to a very small clit, ie, one without a lot of surface area to work with for absorption.
Pumping can temporarily increase the size, and even after it returns to normal size, some people find the increased blood flow to the area that pumping stimulates can mean it stays routinely a little more engorged or is quicker to respond to touch.
Nothing will increase the amount of nerve endings you have, although for most people that is not the problem; that's one of the most "wired" areas of the body. Blood flow, mood / sex drive, or position (is your clit situated deeper than normal, or have a larger / more obstructive hood, that kind of thing) are things that affect sensation more.
Another approach is to learn new techniques of stimulation. The part of the clitoris you can see is a small part of a large complex of erectile tissue situated under and all around the labia. Using a wand vibe on your labia (maybe with a washcloth or something to diffuse the sensation) can reach these parts, or fingers or a vibe in the vagina angled or crooked to reach the classic g-spot area. (I think it's generally agreed now that the g-spot is the result of stimulating part of the clitoral complex, rather than its own separate thing, although this area of women's anatomy has been so little studied by medicine that doubtless this debate will go on for many more years.) If this is new information for any clitoris owners reading this, doing a web search for some modern diagrams of the clitoral complex may be illuminating and give you ideas of how to get in touch with yours! The "underground" parts aren't as sensitive as the aboveground glans clitoris, but they are still pleasurable to touch, and when they are engorged with blood as a result of stimulation, the glans becomes more sensitive along with them.