In garden Eve repents at no time (5)
I believe the answer is:
never
'at no time' is the definition.
(synonyms)
'in garden eve repents' is the wordplay.
'in' indicates the answer is hidden within the clue.
'NEVER' is hidden within 'garden eve repents'.
(Other definitions for never that I've seen before include "Strong negative" , "Certainly not!" , "Not in a month of Sundays" , "when hell freezes over?" , "Not ever" .)