Scrap uncooked sides of potato (4)
I believe the answer is:
spud
'potato' is the definition.
(spud can informally mean potato)
'scrap uncooked sides' is the wordplay.
'scrap' becomes 'sp' (I am not sure about this - if you are sure you should believe this answer much more).
'sides' means to remove the middle letters (only the letters on the sides are used).
'uncooked' with its middle taken out is 'ud'.
'sp'+'ud'='SPUD'
'of' is the link.
Can you help me to learn more?
(Other definitions for spud that I've seen before include "One might have an eye" , "The common potato" , "short, stocky person" , "King Edward, e.g." , "Potato (colloq.)" .)