The term 'Hook Attachment' refers to a type of fishing equipment used to attach BAIT to a fishing hook. The crossword solution for this term is 'BAIT, ' which is a type of food or lure used to attract fish. BAIT can be live, such as worms or insects, or artificial, such as lures or jigs. Hook attachments are necessary for successful fishing, as they allow the BAIT to be securely attached to the hook and provide a more effective presentation to the fish.