I am beyond a love of painting (7)
I believe the answer is:
impasto
'painting' is the definition.
(I know that impasto is a type of painting)
'i am beyond a love' is the wordplay.
'i am' becomes 'I'm' (contraction).
'beyond' becomes 'past' (to go beyond something is to go past it).
'a love' becomes 'o' (love means zero in tennis).
'im'+'past'+'o'='IMPASTO'
'of' acts as a link.
(Other definitions for impasto that I've seen before include "Technique of paint applied thickly" , "Style of painting" , "Thickly-applied painting technique" , "artist's application" , "artistic technique" .)