Crossword Genius

Succulent spot (4)

Ross

I believe the answer is:

sill

(Other definitions for sill that I've seen before include "Shelf at the foot of a window" , "Window edge" , "Horizontal intrusion of igneous rock between sedimentaries, as in much of Hadrian's Wall" , "Mass of rock" , "Horizontal timber forming the bottom of a framework" .)

I've seen this clue in the LA Times.
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