Yes, acupuncture works for most clogged ears, but clogged ears can be caused by a couple different situations. You need to talk to your practitioner regarding that.
Alexandre Hillairet, DAOM.
If it's a feeling of being clogged, you've visited an ENT and there's nothing in the ear canal, then, yes, acupuncture can often be helpful.
It's also important to keep in mind that the ear is connected to the throat via some very small canals. Just because you may be feeling something in the ear, doesn't always mean the problem is in the ear. I had a patient recently who came to me with ear pain and the problem turned out to be a fairly advanced cancer that had spread to the lymph nodes under the jaw/ear.
Cases like that are precisely why you need to involve practitioners of conventional and Chinese medicine in an integrative fashion.