Encourage farm produce (3)
I believe the answer is:
egg
This clue could be a double definition.
'encourage' is the first definition.
'farm produce' is the second definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
Can you help me to learn more?
(Other definitions for egg that I've seen before include "Poultry product" , "It comes before or after the chicken?" , "Item with a yolk" , "Reproductive unit" , "It may be poached" .)