Fat creator of Adrian M (4)

I believe the answer is:

suet

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'fat' is the definition.
(I know that suet is a type of edible fat)

I can't explain the rest of the clue.

(Other definitions for suet that I've seen before include "Edible fat used in cooking" , "Thin pancake" , "Hard white fat on sheep's kidneys" , "Hard white cooking fat" , "Hard fat in cattle and sheep" .)

I've seen this clue in The Independent.

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