Deli on the fringes marinated missing duck left to rot (7)
I believe the answer is:
disused
'left to rot' is the definition.
I can't tell whether this defines the answer.
'deli on the fringes marinated missing duck' is the wordplay.
'deli on the fringes' becomes 'di' (I am not sure about this - if you are sure you should believe this answer much more).
'marinated' becomes 'soused' (I've seen this before).
'missing' is a deletion indicator.
'duck' becomes 'o' (resembles zero - 'duck' in cricket).
'soused' with 'o' removed is 'sused'.
'di'+'sused'='DISUSED'
Can you help me to learn more?
(Other definitions for disused that I've seen before include "No longer observed or practised" , "empty" , "Neglected" , "Cast out" , "No longer operated" .)