She makes a welcome return (3)
I believe the answer is:
eva
'she' is the definition.
'a welcome return' is the wordplay.
'a welcome' becomes 'ave' (I've seen this before).
'return' is a reversal indicator.
'ave' reversed gives 'EVA'.
'makes' acts as a link.
(Other definitions for eva that I've seen before include "Girl's name; space walk" , "- Braun, Hitler's mistress" , "Miss Peron, perhaps" , "-- Cassidy, singer, 1963-96" , "- - , nee Braun" .)