Crossword Genius

Like a Buick, say, unable to go much further? (5)


I believe the answer is:


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'further?' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

'like a buick say unable to go much' is the wordplay.
I cannot quite see how this works, but
'to go' could be 're' (I've seen this in other clues) and 're' is located in the answer.
The remaining letters 'tid' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for tired that I've seen before include "knackered" , "Physically or mentally weary" , "Drowsy" , "Exhausted" , "Played out" .)

I've seen this clue in The Independent.
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