Crossword Genius

One committed by a lone wanderer in extremes of frailty? (6)

Ross

I believe the answer is:

felony

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

'one committed' is the definition.
I can't judge whether this definition defines the answer.

'a lone wanderer in extremes of frailty?' is the wordplay.
'a lone wanderer' becomes 'elon' (I am not sure about this - if you are sure you should believe this answer much more).
'in' indicates putting letters inside.
'extremes of' says to hollow out the word (remove centre letters) (only the letters at the extremes of the word).
'frailty' with its centre removed is 'fy'.
'elon' put into 'fy' is 'FELONY'.

'by' is the link.

Can you help me to learn more?

(Other definitions for felony that I've seen before include "Grave crime" , "Serious crime" , "Criminal offence" , "Criminal act" .)

I've seen this clue in the Evening Standard.
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