Nutritional drink returned here in Rome (7)
I believe the answer is:
trophic
'nutritional' is the definition.
(trophic can mean relating to nutrition)
'drink returned here in rome' is the wordplay.
'drink' becomes 'port' (port is a kind of drink).
'returned' says the letters should be written backwards.
'here in rome' becomes 'hic' ('here' in Latin).
'port' written backwards gives 'trop'.
'trop'+'hic'='TROPHIC'
(Other definitions for trophic that I've seen before include "as nutrition" , "of food" .)