Many a demo is a phrase used to describe a situation where a product or service is demonstrated multiple times. It is often used in the context of sales, marketing, and customer service. The term 'many a demo' can also be used to refer to a situation where a product or service is tested multiple times before being released to the public. The crossword solution for the term 'many a demo' is 'TAPE, ' which refers to the use of audio or video recordings to capture the demonstration.