Bank card rorts I'm discovering with construction materials (6,3,6)

I believe the answer is:

bricks and mortar

I'm a little stuck... Click here to teach me more about this clue!

'bank card rorts i'm discovering with construction materials' is the definition.
I can't judge whether this definition defines the answer.

'bank card rorts i'm discovering with construction materials' is the wordplay.
'bank card rorts i'm' can be anagrammed to 'BRICKS AND MORTAR'.
However, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for bricks and mortar that I've seen before include "Housing" , "buildings" .)

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

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