Scrape where son caught by mob (8)

I believe the answer is:

scrabble

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'scrape' is the definition.
(thesaurus)

'son caught by mob' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'caught by' becomes 'c' (cricket abbreviation. I am not sure about the 'by' bit.).
'mob' becomes 'rabble' (synonyms).
's'+'c'+'rabble'='SCRABBLE'

'where' acts as a link.

Can you help me to learn more?

(Other definitions for scrabble that I've seen before include "Root around" , "Grope for something - board game" , "Popular word game played on a board" , "Popular word game using board" , "In which X=8 and Z=10" .)

I've seen this clue in The Sun.

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