She wrote about Adrian M getting fat (4)
I believe the answer is:
suet
'fat' is the definition.
(I know that suet is a type of edible fat)
'she wrote about adrian m' is the wordplay.
I cannot really see how this works, but
'she' could be 'sue' and 'sue' is located in the answer.
A single letter 't' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'getting' acts as a link.
Can you help me to learn more?
(Other definitions for suet that I've seen before include "Hard white fat on sheep's kidneys" , "Hard edible fat" , "Fatty tissue" , "Solid fat used in cooking" , "Fatty stuff used in cooking" .)