Planned and, indeed, sign (8)

I believe the answer is:

designed

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'planned' is the definition.
('design' can be a synonym of 'plan')

I can't explain the rest of the clue.

(Other definitions for designed that I've seen before include "Conceived and drew something" , "Made a drawing or blueprint" , "Make a drawing or blueprint" , "Meant" , "Conceived of and produced 3dn" .)

I've seen this clue in the Sydney Morning Herald.

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