Clothes become dated? Rubbish (7)

I believe the answer is:

garbage

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'rubbish' is the definition.
(both can mean refuse or trash)

'clothes become dated?' is the wordplay.
'clothes' becomes 'garb' (garb is a kind of clothes).
'become dated?' becomes 'age' (I can't explain this - if you can you should believe this answer much more).
'garb'+'age'='GARBAGE'

Can you help me to learn more?

(Other definitions for garbage that I've seen before include "Worthless matter" , "'Refuse, rubbish (7)'" , "A beggar? - that may be rubbish" , "Pop group; rubbish" , "Waste, refuse" .)

I've seen this clue in The Times and The Sun.

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