There are 2 solutions. The longest is SEALANT with 7 letters, and the shortest is SPACER with 6 letters.
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Yes, "GAP FILLER" is currently trending (last update: 09 Oct 2026). Many solvers seem to find this clue challenging! Other clues with traffic peaks today are: sizeable, compound, Component, Stop right there and Standing.
Solutions are between 6 and 7 letters long.