A shadow box is a three-dimensional display case, typically used to showcase items such as memorabilia, awards, or other keepsakes. The term 'shadow box' can also refer to a type of picture frame with a deep space between the glass and the backing, which allows for items to be placed within the frame. The crossword solution for the term 'shadow box' is SPAR, which is an acronym for Self-contained Portable Audio Recorder. This device is used to record audio in a variety of settings, including live performances, interviews, and lectures.