In time, is famed for freshness! (5)
I believe the answer is:
daisy
'famed for freshness' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'in time is' is the wordplay.
'in' means one lot of letters goes inside another.
'time' becomes 'day' (day is a kind of time).
'day' enclosing 'is' is 'DAISY'.
Can you help me to learn more?
(Other definitions for daisy that I've seen before include "Common plant" , "Composite" , "Old song: '. . . . ., . . . . . give me your answer, do'" , "Lawn flower, weed" , "Flower of lawn and meadow" .)