Tan detailing on tan cow (8)

I believe the answer is:

browbeat

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'cow' is the definition.
(I've seen this before)

'tan detailing on tan' is the wordplay.
'tan detailing on' becomes 'brow' (I can't justify this - if you can you should give a lot more credence to this answer).
'tan' becomes 'beat' (I've seen this before).
'brow'+'beat'='BROWBEAT'

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(Other definitions for browbeat that I've seen before include "Threaten - bully" , "Hector" , "Intimidate, bulldoze" , "cow" , "Intimidate with words" .)

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

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