Crossword Genius

Become obsolescent in time (4)

Ross

I believe the answer is:

date

I'm a little stuck... Click here to teach me more about this clue!

'time' is the definition.
(I know that time can be written as date)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for date that I've seen before include "escort" , "Rendezvous" , "Tropical fruit" , "may be fruitful" , "Sticky fruit" .)

I've seen this clue in The Globe and Mail.
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