Getting supplies is suspended at Christmas (8)

I believe the answer is:

stocking

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'getting' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'supplies is suspended at christmas' is the wordplay.
'supplies' becomes 'stock'.
'is suspended at christmas' becomes 'ing' (I can't explain this - if you can you should believe this answer much more).
'stock'+'ing'='STOCKING'

Can you help me to learn more?

(Other definitions for stocking that I've seen before include "Filling up" , "Covering for foot or leg" , "fireside D [DECORATION]" , "some legwear" , "Keeping supplies of; item of wear" .)

I've seen this clue in The Globe and Mail.

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