Plan put Berlin in a pickle (9)

I believe the answer is:

blueprint

'plan' is the definition.
(blueprint is a kind of plan)

'put berlin in a pickle' is the wordplay.
'in a pickle' is an anagram indicator (UK expression meaning 'in trouble or difficulty').
'put'+'berlin'='putberlin'
'putberlin' anagrammed gives 'BLUEPRINT'.

(Other definitions for blueprint that I've seen before include "Original plan influencing subsequent decisions" , "Prototype" , "Formula" , "sketch" , "Technical drawing" .)

I've seen this clue in The Times.

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