Stick cut off sweet (7)

I believe the answer is:

gumdrop

I'm a little stuck... Click here to teach me more about this clue!

'sweet' is the definition.
(gumdrop is a kind of sweet)

'stick cut off' is the wordplay.
'stick' becomes 'gum' (gum can mean to glue or stick).
'cut off' becomes 'drop' (dropping is a kind of cutting. I am not sure about the 'off' bit.).
'gum'+'drop'='GUMDROP'

Can you help me to learn more?

(Other definitions for gumdrop that I've seen before include "It may be sucked" , "Small sweet (goody goody!)" , "Type of jelly sweet" , "Fungus attacking wood" , "chew" .)

I've seen this clue in The Guardian.

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