Plenty, for instance, without the first couple (5)

I believe the answer is:

ample

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'plenty' is the definition.
(ample means enough or plenty)

I don't understand how the rest of the clue works.

(Other definitions for ample that I've seen before include "Large, capacious" , "Quite sufficient, more than enough" , "Plenty, more than enough" , "Easily sufficient" , "Large, accommodating" .)

I've seen this clue in the Sydney Morning Herald.

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