Fill the seams (5)
I believe the answer is:
caulk
(Other definitions for caulk that I've seen before include "Make watertight by sealing joints or seams" , "Make boat waterproof by filling seams" .)
I've seen this clue in the Penny Press.
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.