How to confound a labyrinth (5)

I believe the answer is:

amaze

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'how to confound' is the definition.
I can't tell whether this definition defines the answer.

'a labyrinth' is the wordplay.
'labyrinth' becomes 'maze' (synonyms).
'a'+'maze'='AMAZE'

Can you help me to learn more?

(Other definitions for amaze that I've seen before include "Stun" , "Startle" , "Bewilder" , "Floor" , "Bowl over" .)

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

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