Murphy's jacket? (4)
I believe the answer is:
peel
This could be a double definition.
'murphy's' is the first definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Maybe there's a link between them I don't understand?
'jacket?' is the second definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for peel that I've seen before include "Rind of fruit" , "A PM; a fortified tower" , "Outer skin" , "Remove skin as from potato" , "Remove skin of vegetable or fruit" .)