Another name for a return voyage (5)
I believe the answer is:
alias
'another name' is the definition.
(I've seen this in another clue)
'a return voyage' is the wordplay.
'return' says the letters should be written backwards.
'voyage' becomes 'sail' (synonyms).
'sail' written backwards gives 'lias'.
'a'+'lias'='ALIAS'
'for' is the link.
(Other definitions for alias that I've seen before include "Assumed identity" , "Otherwise - an assumed name" , "Cabbage salad" , "Alternative name" , "aka" .)