Crossword Genius

Source of corruption of fat union boss (12)

Ross

I believe the answer is:

fountainhead

'source' is the definition.
(fountainhead is a kind of source)

'corruption of fat union boss' is the wordplay.
'corruption of' is an anagram indicator.
'boss' becomes 'head' (synonyms).
'fat'+'union'='fatunion'
'fatunion' anagrammed gives 'fountain'.
'fountain'+'head'='FOUNTAINHEAD'

'of' is the link.

(Other definitions for fountainhead that I've seen before include "Original source" , "spring" , "Chief source" .)

I've seen this clue in the Sydney Morning Herald.
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