Half-heartedly make for island (5)

I believe the answer is:

crete

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'for island' is the definition.
(Greek island)

I can't explain the rest of the clue.

(Other definitions for crete that I've seen before include "Knossos island" , "European location" , "Greek territory" , "Erect (anag) - Mediterranean island" , "Major island south of Greece" .)

I've seen this clue in The Times.

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