Fit it up in renovated chalet (8)
I believe the answer is:
athletic
'fit' is the definition.
(I've seen this before)
'it up in renovated chalet' is the wordplay.
'up' indicates an anagram.
'in' is an insertion indicator.
'renovated' is an anagram indicator.
'it' anagrammed gives 'ti'.
'chalet' with letters rearranged gives 'athlec'.
'ti' going into 'athlec' is 'ATHLETIC'.
(Other definitions for athletic that I've seen before include "Sporting, vigorous" , "Strong and active, good at sports" , "Fit and strong - football club?" , "Powerful" , "See 12" .)