Teach road layout and shapes (9)
I believe the answer is:
octahedra
'shapes' is the definition.
(octahedron is a kind of shape)
'teach road layout' is the wordplay.
'layout' indicates anagramming the letters (an alternative layout of the letters).
'teach'+'road'='teachroad'
'teachroad' is an anagram of 'OCTAHEDRA'.
'and' acts as a link.
(Other definitions for octahedra that I've seen before include "shapes" , "solid objects" , "Solid artefacts" , "Eight-sided figures" , "Solid figures with eight plane faces" .)