Damaging a tweeter by clipping is far more common with underpowered solid state amps than tube!
Unless you can state that you fried the tweeter using a tube amp, I wouldn't worry about it, but to answer the question directly, the above responses are quite correct. If this is an on-going problem, I would consider installing a fuse to protect your tweeter, or consider a more powerful amp or a more efficient set of speakers so as to avoid clipping.
