Endlessly well, eg newly tan and stylish (7)
I believe the answer is:
elegant
'stylish' is the definition.
(both can mean fancy or ornate)
'endlessly well eg newly tan' is the wordplay.
'endlessly' indicates the central letters (the ends of the words are removed).
'newly' is an anagram indicator.
The centre of 'well' is 'el'.
'tan' with letters rearranged gives 'ant'.
'el'+'eg'+'ant'='ELEGANT'
'and' acts as a link.
(Other definitions for elegant that I've seen before include "A gentle way to be stylish" , "Graceful - refined" , "luxurious style?" , "Ingenious" , "Chic; smart" .)