Final answer:
The song 'Overture' from AJR's album 'The Click' is the track that acts as a medley and bridges the gap between 'The Click' and 'Neotheater'.
Step-by-step explanation:
The song that is in two parts between "The Click" and "Neotheater" by the band AJR is "Overture" from their album "The Click". This song acts as a medley and serves as an introduction to the album, blending together snippets from various songs that appear later on.
It is unique in that it encapsulates the album's themes and motifs, setting the stage for the listener's experience. AJR is known for their creative musical style, which often includes complex arrangements and a blend of different genres.