Shelves have no large advantages (5)
I believe the answer is:
edges
'advantages' is the definition.
(edge is a kind of advantage)
'shelves have no large' is the wordplay.
'shelves' becomes 'ledges' ('ledge' can be a synonym of 'shelf').
'have no' is a deletion indicator.
'large' becomes 'l'.
'ledges' with 'l' taken out is 'EDGES'.
(Other definitions for edges that I've seen before include "Outside limits" , "Sharpened sides of blades" , "Outer limits" , "Fringes" , "Borders, rims" .)