Dish needed by the phone (7)

I believe the answer is:

charger

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'dish' is the definition.
(I know that charger is a type of dish)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for charger that I've seen before include "One may provide juice" , "One demanding payment" , "that would prevent loss of power?" , "He doesn't mean it to be a gift" , "Big old plate" .)

I've seen this clue in The Times.

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