Ask questions about one showing self-assurance (5)

I believe the answer is:

poise

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'self-assurance' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for poise that I've seen before include "Aplomb" , "Dignity and assurance of manner" , "Dignity; equilibrium" , "Grace; equilibrium" , "Elegance" .)

I've seen this clue in The Irish Independent.

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