The term 'attention-getting shout' can be represented by the following crossword solutions: Halloo (6 letters), AHOY (4 letters), HEY (3 letters), Heyyou (6 letters), and Yoohoo (6 letters). These are all exclamations used to get someone's attention, often in a loud or boisterous manner. Halloo is an old-fashioned term, while AHOY is more commonly associated with sailors. HEY is a casual greeting, while Heyyou is a more direct way of getting someone's attention. Finally, Yoohoo is a playful way of calling out to someone.