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" .)