Lasting well in its present form (10)

I believe the answer is:

persistent

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'lasting well' is the definition.
'persistent' can be an answer for 'lasting' (thesaurus). I am not certain of the 'well' bit.

'its present form' is the wordplay.
'form' is an anagram indicator (another form of the letters).
'its'+'present'='itspresent'
'itspresent' anagrammed gives 'PERSISTENT'.

'in' is the link.

Can you help me to learn more?

(Other definitions for persistent that I've seen before include "Resolute - interminable" , "Not taking "no" for an answer" , "single-minded" , "Endless" , "Lasting, prolonged" .)

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