Hi Dirk! You're definitely on the right track-- Nice work with the lab experience so far. Keep it up. 🙂
I'm a little confused by your question... Maybe you can elaborate on your two areas of interest? What do you mean by developmental psychology? That's a huge field, and developmental psych *programs* typically do not provide clinical training.
That said, there's no reason you cannot conduct child research in a Clinical Program. Depression in children, for example, is a really popular area and there's been some really interesting work done by a variety of labs. There are also a number of clinical psych faculty who do at least some research with typically-developing children, studying things that would normally fall in the developmental psych domain (like language development and understanding of emotions).
I hope this makes sense! Feel free to clarify your original areas, and then we may be able to help more. It's not wrong to apply to different areas. Searching for schools is easier once you have your area of research interest figured out, because then you can look at who is doing work in that area and apply based on specific mentors.