Old lady, a bit naughty, eating meat in judicial office (10)
I believe the answer is:
magistracy
'judicial office' is the definition.
'magistracy' can be an answer for 'office' (magistracy is a kind of office). I'm not certain of the 'judicial' bit.
'old lady a bit naughty eating meat' is the wordplay.
'old lady' becomes 'ma' (both can informally mean mother).
'a bit naughty' becomes 'racy' (I've seen this in another clue).
'eating' means one lot of letters goes inside another.
'meat' becomes 'gist' (synonyms).
'ma'+'racy'='maracy'
'maracy' going around 'gist' is 'MAGISTRACY'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for magistracy that I've seen before include "office of lawyer?" , "legal body" , "The bench" .)