See: doctor to nurse is sweet (7)
I believe the answer is:
melodic
'is sweet' is the definition.
(similar in meaning)
'see doctor to nurse' is the wordplay.
I cannot really understand how this works, but
'see' could be 'lo' (archaic word meaning 'look!') and 'lo' is found within the answer.
'doctor' could be 'medic' (I've seen this before) and 'medic' is found in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for melodic that I've seen before include "Old mice (anag.)" , "Pleasantly musical" , "Pleasant-sounding" , "Pleasant to listen to" , "Pleasant-sound" .)