Crossword Genius

Settles on the rim — effect of ground movement (8)

Ross

I believe the answer is:

landslip

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'settles on the rim effect' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'ground movement' is the wordplay.
'ground' becomes 'land' (synonyms).
'movement' becomes 'slip' (slip is a kind of movement).
'land'+'slip'='LANDSLIP'

'of' acts as a link.

Can you help me to learn more?

(Other definitions for landslip that I've seen before include "Avalanche" , "Fall of earth, stones, etc down slope" , "Rockfall" , "Earth movement" .)

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