Could it cause an explosion around crustaceans? (5)
I believe the answer is:
shell
This might be a double definition.
'could' is the first definition.
Although both the answer and definition are verbs in their base form, I don't understand how they can define each other.
'it cause an explosion around crustaceans?' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for shell that I've seen before include "Outer covering of 1 across, say" , "(Turtle's) carapace" , "Protective outer casing" , "Carapace or explosive missile" , "layer of jacket" .)