Salesman delivers this new model (7)
I believe the answer is:
pattern
'model' is the definition.
(pattern is a kind of model)
'salesman delivers this new' is the wordplay.
'salesman delivers this' becomes 'patter' (as in a sales talk or patter).
'new' becomes 'n'.
'patter'+'n'='PATTERN'
(Other definitions for pattern that I've seen before include "Example; decorate" , "Repeated decorative design" , "Ornamentation" , "Design for copying" , "Arrangement of decorative motifs" .)