Crossword Genius

Sharp alpha male, whimsical Australian mostly on the inside (10)

Ross

I believe the answer is:

astringent

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

'inside' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

'sharp alpha male whimsical australian mostly on the' is the wordplay.
'sharp alpha male whimsical australian' becomes 'astringe' (I can't justify this - if you can you should give a lot more credence to this answer).
'mostly' means to remove the first letter (a).
'the' becomes 't' (the is pronounced as a 't' sound in some dialects).
'on' with its initial letter taken off is 'n'.
'astringe'+'n'+'t'='ASTRINGENT'

Can you help me to learn more?

(Other definitions for astringent that I've seen before include "Styptic" , "Harsh" , "for checking bleeding" , "description of wine?" , "medical preparation" .)

I've seen this clue in The Times.
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