Opponents in charge of hospital food (8)
I believe the answer is:
sandwich
'food' is the definition.
(sandwich is a kind of food)
'opponents in charge of hospital' is the wordplay.
I cannot really see how this works, but
'hospital' could be 'san' (I've seen this in other clues) and 'san' is found in the answer.
'in charge' could be 'ic' and 'ic' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sandwich that I've seen before include "Resort" , "Pieces of bread with filling" , "Picnic food" , "Bread-based snack" , "Snack food" .)