The crossword solution for the term 'Nursery Piggy' is TOE. This is a reference to the nursery rhyme 'This Little Piggy', which is a popular children's song. The song is about a mother pig counting her five piglets' toes, and each TOE is represented by a different action. The nursery rhyme is often used to play a game with young children, where the mother or father tickles each of the child's toes in turn.