Decoration got by medic turning on splendid display (6)
I believe the answer is:
pompom
'decoration' is the definition.
(I know that pompom is a type of adornment)
'medic turning on splendid display' is the wordplay.
'medic' becomes 'mo' (medical officer).
'turning' says the letters should be written backwards.
'on' is a charade indicator (letters next to each other).
'splendid display' becomes 'pomp' (I've seen this in another clue).
'mo' written backwards gives 'om'.
'om' after 'pomp' is 'POMPOM'.
'got by' is the link.
(Other definitions for pompom that I've seen before include "Anti-aircraft weapon" , "Hat ornament" , "Top decoration" , "Cheerleader's ball of material" , "Fluffy ball - type of gun" .)