Jolly good chaps in building (6)

I believe the answer is:

bricks

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'jolly good chaps' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe there's a link between them I don't understand?

I can't explain the rest of the clue.

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(Other definitions for bricks that I've seen before include "Building components" , "Blocks of clay" , "Building blocks" , "See 11 Across" .)

I've seen this clue in the Evening Standard.

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