World leader's dropped from lack of food (5)

I believe the answer is:

earth

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'world' is the definition.
(synonyms)

I don't understand the rest of the clue.

(Other definitions for earth that I've seen before include "Make electrics safe" , "Third rock from the Sun" , "cost of which is very high" , "wire" , "Third planet from the Sun" .)

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

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