Carefully done engraving is about love in retirement (6)
I believe the answer is:
soigne
'carefully done' is the definition.
(French term meaning dressed with great care)
'engraving is about love in retirement' is the wordplay.
'engraving' becomes 'eng' (abbreviation).
'about' indicates putting letters inside.
'love' becomes 'o' (love means zero in tennis).
'in retirement' shows that the letters should be reversed in order (retire can mean to go back or backwards).
'eng'+'is'='engis'
'engis' enclosing 'o' is 'engios'.
'engios' backwards is 'SOIGNE'.
(Another definition for soigne that I've seen is " well-groomed".)