The term 'saucer occupant' can be broken down into two crossword solutions: CUP (3 letters) and ALIEN (5 letters). A CUP is a small bowl-shaped container used for drinking, usually made of ceramic or glass. An ALIEN is a creature from outer space, often depicted as having an extraterrestrial appearance. Therefore, the term 'saucer occupant' could refer to an extraterrestrial creature that is drinking from a CUP.