Crossword Genius

Infinite spring gone then? (9)

Ross

I believe the answer is:

boundless

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'infinite' is the definition.
(similar in meaning)

'spring gone then?' is the wordplay.
'spring' becomes 'bound' (bounding is a kind of springing).
'gone then?' becomes 'less' (I can't explain this - if you can you should believe this answer much more).
'bound'+'less'='BOUNDLESS'

Can you help me to learn more?

(Other definitions for boundless that I've seen before include "Without limits" , "Unlimited" , "Having no limit, extensive" , "Seemingly without limit" .)

I've seen this clue in The Telegraph.
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