Derogatory lie countryman concocted about politician (15)

I believe the answer is:

uncomplimentary

'derogatory' is the definition.
('uncomplimentary' can be similar in meaning to 'derogatory')

'lie countryman concocted about politician' is the wordplay.
'concocted' is an anagram indicator.
'about' indicates putting letters inside.
'politician' becomes 'mp'.
'lie'+'countryman'='liecountryman'
'liecountryman' anagrammed gives 'uncolimentary'.
'uncolimentary' going around 'mp' is 'UNCOMPLIMENTARY'.

I've seen this clue in The Telegraph.

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