Medical expert, old man concealing damage, is appearing in court (10)
I believe the answer is:
pharmacist
'medical expert' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?
'old man concealing damage is appearing in court' is the wordplay.
'old man' becomes 'pa' (both can mean someone's father).
'concealing' indicates putting letters inside.
'damage' becomes 'harm' (synonyms).
'appearing in' is an insertion indicator.
'court' becomes 'ct' (abbreviation used in road names).
'pa' enclosing 'harm' is 'pharma'.
'is' put within 'ct' is 'cist'.
'pharma'+'cist'='PHARMACIST'
Can you help me to learn more?
(Other definitions for pharmacist that I've seen before include "One who dispenses medicines" , "Drug dispenser" , "Drug dealer" , "Drugs dispenser" , "Medicine dispenser" .)