Some grey matter to defy cryptic clue describing source of misery (10)
I believe the answer is:
cerebellum
'some grey matter' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'defy cryptic clue describing source of misery' is the wordplay.
'defy' becomes 'rebel' (I've seen this before).
'cryptic' is an anagram indicator (a cryptic or obscure order of the letters).
'describing' indicates putting letters inside (describe can mean to form the outline of).
'source of' suggests taking the first letters (the start - or source - of the word).
The initial letter of 'misery' is 'm'.
'clue' is an anagram of 'celu'.
'rebel' going into 'celu' is 'cerebellu'.
'cerebellu'+'m'='CEREBELLUM'
'to' is the link.
Can you help me to learn more?
(Other definitions for cerebellum that I've seen before include "motor controller" , "bit of brain" , "part of the brain" .)