Drawing up as telephone rings (6)
I believe the answer is:
pastel
'drawing' is the definition.
(I've seen this before)
'up as telephone rings' is the wordplay.
'rings' indicates a hidden word (in the sense of encircling/enclosing).
'PASTEL' is hidden within 'up as telephone'.
(Other definitions for pastel that I've seen before include "Type of crayon" , "Crayon used in art" , "Chalk-like crayon" , "Pale or light colors" , "Delicate colour found in plates" .)