Always in same version (4)
I believe the answer is:
ever
'always' is the definition.
(synonyms)
'in same version' is the wordplay.
'in' says the answer is hidden in the clue.
'EVER' is hidden in the letters of 'same version'.
(Other definitions for ever that I've seen before include "To the end of time" , "At all times, always" , "Always and permanent" , "constantly" , "Perpetually" .)