Crossword Genius

This hat is out of date (3)

Ross

I believe the answer is:

old

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This clue could be a double definition.

'this hat' is the first definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

'out of date' is the second definition.
(I've seen this in another clue)

'is' acts as a link.

Can you help me to learn more?

(Other definitions for old that I've seen before include "Obsolete" , "Much-used" , "Getting on" , "Venerable" , "At an early stage - at a late stage" .)

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