Crossword Genius

Load of chewing gum covered air conditioner (4)

Ross

I believe the answer is:

pack

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'load' is the definition.
(packing is a kind of loading)

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

Can you help me to learn more?

(Other definitions for pack that I've seen before include "Cards; group of animals" , "Wolf group" , "Prepare for holiday" , "Collection of wolves" , "Stow" .)

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