Lover of beauty hates to move before summer in Nice (8)
I believe the answer is:
aesthete
'lover of beauty' is the definition.
(I've seen this before)
'hates to move before summer in nice' is the wordplay.
'to move' indicates an anagram.
'before' says to put letters next to each other.
'summer in nice' becomes 'ete' ('summer' in French - Nice is in France).
'hates' anagrammed gives 'aesth'.
'aesth'+'ete'='AESTHETE'
(Other definitions for aesthete that I've seen before include "Person seeing beauty in art" , "Person with deep interest in art and beauty" , "One appreciating art and beauty" , "Person with great sensitivity towards the arts and the beautiful" , "Someone claiming special knowledge of beauty" .)