Planners try at working honestly and openly (13)

I believe the answer is:

transparently

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'honestly and openly' is the definition.
I can't judge whether this definition defines the answer.

'planners try at working' is the wordplay.
'working' indicates anagramming the letters.
'planners'+'try'+'at'='plannerstryat'
'plannerstryat' with letters rearranged gives 'TRANSPARENTLY'.

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(Another definition for transparently that I've seen is " clearly".)

I've seen this clue in The Times.

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