By oneself in plant around noon (5)

I believe the answer is:

alone

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'by oneself' is the definition.
(being by oneself is being alone)

'in plant around noon' is the wordplay.
'in' means one lot of letters goes inside another.
'plant around' becomes 'aloe' (aloe is a kind of plant. I am not sure about the 'around' bit.).
'noon' becomes 'n'.
'aloe' enclosing 'n' is 'ALONE'.

Can you help me to learn more?

(Other definitions for alone that I've seen before include "Unaccompanied" , "Exclusively; solitary" , "Without others being involved" , "On one's own" , "unique" .)

I've seen this clue in The Telegraph.

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