Straws and didgeridoos, essentially

The answer to the crossword question “Straws and didgeridoos, essentially is TUBES” refers to the fact that both straws and didgeridoos are hollow cylindrical objects or “tubes”. Straws are commonly used for drinking beverages while didgeridoos are musical instruments traditionally played by Indigenous Australians. While their purposes may differ, they share the same basic shape, which is a long tube with an open end. This makes the answer “tubes” a fitting description for both items.