Most irritable conservative Jewish leader is in Paris (9)

I believe the answer is:

crabbiest

'most irritable' is the definition.

'conservative jewish leader is in paris' is the wordplay.
'conservative' becomes 'c' (abbreviation commonly used in UK politics).
'jewish leader' becomes 'rabbi' (I've seen this before).
'is in paris' becomes 'est' ('is' in French).
'c'+'rabbi'+'est'='CRABBIEST'

I've seen this clue in The Guardian.

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