Butler nips out to make plans (10)

I believe the answer is:

blueprints

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

'butler nips out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'butler'+'nips'='butlernips'
'butlernips' is an anagram of 'BLUEPRINTS'.

'to make' is the link.

(Another definition for blueprints that I've seen is " Designs".)

I've seen this clue in The Telegraph.

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