Replacing Kelly, Ida is refined (8)
I believe the answer is:
ladylike
'is refined' is the definition.
(similar in meaning)
'replacing kelly ida' is the wordplay.
'replacing' is an anagram indicator (placing again).
'kelly'+'ida'='kellyida'
'kellyida' anagrammed gives 'LADYLIKE'.
(Other definitions for ladylike that I've seen before include "Of a woman, refined and genteel" , "Graciously feminine" , "Decorously feminine" , "Genteel (not referring to gents)" , "Refined and fastidious" .)