Lasting like a sort of nude circle (8)
I believe the answer is:
enduring
'lasting' is the definition.
(similar in meaning)
'a sort of nude circle' is the wordplay.
'a sort of' indicates anagramming the letters.
'circle' becomes 'ring' (synonyms).
'nude' with letters rearranged gives 'endu'.
'endu'+'ring'='ENDURING'
'like' acts as a link.
(Other definitions for enduring that I've seen before include "Lasting, unceasing" , "Putting up with something" , "Eternal" , "having lasting qualities" , "Putting up with patiently" .)