Answer: sneck

AnswerCrossword Clue
SNECKClick, as of a latch: Scot.
SNECKLatch: Scot.
snecksmall stone, as a spall, inserted into the spaces between larger pieces of rubble in a wall
sneckto fill (spaces between larger stones) with snecks
sneckdoor latch or its lever
sneckto fasten with a latch