Suppose you do have the temerity to? (7)

I believe the answer is:

presume

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'suppose' is the definition.
(I know that suppose is a more specific form of the action presume)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for presume that I've seen before include "Suppose; take liberties" , "Believe" , "Take for granted" , "Take to be the case" , "Supreme (anag)" .)

I've seen this clue in the Evening Standard.

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