Bucket shape made by French-American corporation (7)

I believe the answer is:

frustum

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'bucket shape' is the definition.
'frustum' can be an answer for 'shape' (frustum is a kind of shape). I'm not certain of the 'bucket' bit.

'by french-american corporation' is the wordplay.
'by' says to put letters next to each other.
'french' becomes 'fr' (abbreviation).
'american' becomes 'US' (abbreviation for United States).
'corporation' becomes 'tum' ('corporation' is a humorous term for stomach fat).
'fr' next to 'us' is 'frus'.
'frus'+'tum'='FRUSTUM'

'made' is the link.

Can you help me to learn more?

(Another definition for frustum that I've seen is " part of cone".)

I've seen this clue in The Guardian.

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