Doctor had met death at sea maybe (7)
I believe the answer is:
drowned
'death at sea maybe' is the definition.
I can't tell whether this defines the answer.
'doctor had met' is the wordplay.
'doctor' becomes 'dr' (abbreviation).
'had' becomes 'owned' ('own' can be a synonym of 'have').
'met' means one lot of letters go next to another.
'dr'+'owned'='DROWNED'
Can you help me to learn more?
(Other definitions for drowned that I've seen before include "Died by submersion" , "Lost at sea" , "Submerged, flooded" , "Suffocated in water" , "Died underwater" .)