Sincere bricklayer's piece of mind (8)

I believe the answer is:

cerebric

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'sincere bricklayer's piece of mind' is the definition.
I can't judge whether this definition defines the answer.

'sincere bricklayer's piece of' is the wordplay.
'piece of' indicates a hidden word.
'CEREBRIC' can be found hidden inside 'sincere bricklayers'.

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

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