"Fake!!, Peatfield states (5)

I believe the answer is:

bogus

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'fake' is the definition.
(synonyms)

'peatfield states' is the wordplay.
'peatfield' becomes 'bog' (I am not sure about this - if you are sure you should believe this answer much more).
'states' becomes 'US' (abbreviation for the United States).
'bog'+'us'='BOGUS'

Can you help me to learn more?

(Other definitions for bogus that I've seen before include "Fake, phoney" , "false impression" , "Dummy" , "Sham, counterfeit" , "Not genuine, sham" .)

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

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