Here are the possible solutions for a catboat has just one clue
Answer
Clue
Relevancy
mast
Clue
A catboat has just one
One on a catboat
Definition
to provide with a long pole that supports a ship's sails
foreandaftsail
Clue
Catboat or sloop feature
cell
Clue
An amoeba has just one
Definition
to store in a honeycomb
edge
Clue
A Möbius strip has just one
Definition
to furnish with a border
etaoin
Clue
"___ shrdlu" (nonsense phrase of old type-setting lore which has an interesting backstory but I can't do it justice in the space of a single clue even a long one like this so yeah it's just kind of a
