The shape that's broader than long (6)
I believe the answer is:
oblong
'the shape that's broader than long' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for oblong that I've seen before include "Figure with opposite sides parallel, longer in one direction" , "Shape of a book" , "Rectangle with adjacent sides unequal" , "Rectangular but not square" , "Strip for planes" .)