The crossword solution for the term 'was nostalgic' is 'ACHED', which means to feel a deep emotional pain or sadness. It is often used to describe a longing for something that has been lost or is no longer available. Nostalgia is a feeling of longing for a past time, place, or person, and it can be both positive and negative. Aching is a physical manifestation of this emotion, and it can be a sign of a deeper emotional pain.