Broccoli perhaps welcomes switching endings for television (6)
I believe the answer is:
greens
'broccoli' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for greens that I've seen before include "Political party" , "Vegetables - on the golf course?" , "Ecology party" , "Places for bowling" , "Signs people should go" .)