Grand-aunt authorised corporal punishment (8)

I believe the answer is:

gauntlet

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'corporal punishment' is the definition.
'gauntlet' can be an answer for 'punishment' (I've seen this before). I am not certain of the 'corporal' bit.

'grand-aunt authorised' is the wordplay.
'grand' becomes 'G' (synonyms).
'authorised' becomes 'let'.
'g'+'aunt'+'let'='GAUNTLET'

Can you help me to learn more?

(Other definitions for gauntlet that I've seen before include "Glove with long sleeve, thrown down challenge" , "It may be thrown down or run" , "Stout glove" , "outdated military punishment" , "What might represent a challenge" .)

I've seen this clue in The Hindu.

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