The term 'PEEPING AID' can be solved by the crossword solution 'SPYHOLE', which is a seven-letter word. A spyhole is a small hole in a door or wall that allows someone to look through and observe what is happening on the other side without being seen. It is commonly used as a security measure, allowing people to see who is outside their door before opening it. Spyholes are also used for surveillance purposes, allowing people to observe activities in a certain area without being detected.