4 Pics 1 Word Level 171

Answer:
Shell
Hint
What is the answer to the 4 Pics 1 Word level with Tacos, Egg shell, Oyster with pearl, and Nut with shell?

Hint
What is the answer to the 4 Pics 1 Word level with Tacos, Egg shell, Oyster with pearl, and Nut with shell?