Implant educated European doctor introduces (5)
I believe the answer is:
embed
'implant' is the definition.
(I know that implant can be written as embed)
'educated european doctor introduces' is the wordplay.
'educated' becomes 'ed' (I've seen this in other clues).
'european' becomes 'e' (abbreviation e.g. EU).
'doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus).
'introduces' is a charade indicator (letters next to each other) (some letters come before or introduce others).
'e'+'mb'='emb'
'ed' put after 'emb' is 'EMBED'.
(Other definitions for embed that I've seen before include "the opposite of 19 [DEBUNK]?" , "Fix firmly and deeply" , "Fix in the mind" , "bringing plant inside" , "Fix securely" .)