Rubber seal (1-4)
I believe the answer is:
o-ring
'rubber seal' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for o-ring that I've seen before include "Toroidal rubber seal" , "Circular seal" .)
I've seen this clue in The Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.