One is about to make a fresh start, though not well (5)

I believe the answer is:

unfit

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'one is about to make a fresh start' is the definition.
I can't tell whether this definition defines the answer.

'not well' is the wordplay.
'not' becomes 'un' (prefix meaning 'not').
'well' becomes 'fit' (associated in meaning).
'un'+'fit'='UNFIT'

'though' is the link.

Can you help me to learn more?

(Other definitions for unfit that I've seen before include "Not prepared" , "not worthy" , "In bad physical condition" , "Not healthy" , "Incapable" .)

I've seen this clue in the Evening Standard.

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