Is lemonade with pulp a suspension?

Yes, lemonade with pulp is a suspension.

A suspension is a heterogeneous mixture in which solid particles are dispersed throughout a liquid. The particles are large enough to be visible to the naked eye and will settle out of the mixture over time. In lemonade with pulp, the pulp consists of small pieces of fruit that are suspended in the liquid. The pulp particles are large enough to be seen and will settle to the bottom of the glass if the lemonade is left undisturbed.