Politician, unusually calm deliberator (7,8)

I believe the answer is:

liberal democrat

'politician' is the definition.
(the Liberal Democrats are a UK political party)

'unusually calm deliberator' is the wordplay.
'unusually' indicates anagramming the letters.
'calm'+'deliberator'='calmdeliberator'
'calmdeliberator' anagrammed gives 'LIBERAL DEMOCRAT'.

(Other definitions for liberal democrat that I've seen before include "Cable, say" , "Politician" , "party person" , "Party member" .)

I've seen this clue in The Times.

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