Shape that's broader than it's long (6)
I believe the answer is:
oblong
'shape that's broader than it's long' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for oblong that I've seen before include "Roughly rectangular" , "Strip for planes" , "Oval" , "Plane figure that deviates from a square by elongation" , "Figure with opposite sides parallel, longer in one direction" .)