Branch of medicine Oscar practised moving around house (12)
I believe the answer is:
orthopaedics
'branch of medicine' is the definition.
'orthopaedics' can be an answer for 'medicine' (orthopaedics is a kind of medicine). I am unsure of the 'branch of' bit.
'oscar practised moving around house' is the wordplay.
'oscar' becomes 'O' (phonetic alphabet: alpha, bravo, charlie etc.).
'moving' indicates an anagram (letters are moved around).
'around' means one lot of letters goes inside another.
'house' becomes 'ho' (abbreviation for house).
'o'+'practised'='opractised'
'opractised' anagrammed gives 'ortpaedics'.
'ortpaedics' going around 'ho' is 'ORTHOPAEDICS'.
Can you help me to learn more?
(Other definitions for orthopaedics that I've seen before include "The treatment of bone and muscle disorders" , "Field to operate" .)