One way and another, I'm enthralled by 'Ask about a Garden Shrub' (7)

I believe the answer is:

skimmia

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

'garden shrub' is the definition.
'skimmia' can be an answer for 'shrub' (I've seen this before). I'm not sure about the 'garden' bit.

'one way and another i'm enthralled by ask about a' is the wordplay.
'one way' becomes 's' (Compass direction - South).
'and' is a charade indicator (letters next to each other).
'another' is an anagram indicator.
'enthralled by' is an insertion indicator ('enthral' can mean 'capture').
'ask about' becomes 'kim' (I am not sure about this - if you are sure you should believe this answer much more).
'im' anagrammed gives 'mi'.
'kim'+'a'='kima'
'mi' put within 'kima' is 'kimmia'.
's'+'kimmia'='SKIMMIA'

Can you help me to learn more?

(Another definition for skimmia that I've seen is " evergreen shrub".)

I've seen this clue in The Guardian.

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