Range of notes on fashion line implying something not the right size (5,5)
I believe the answer is:
scale model
'something not the right size' is the definition.
(something smaller than the real thing)
'range of notes on fashion line' is the wordplay.
'range of notes' becomes 'scale' (musical scale).
'on' means one lot of letters go next to another.
'fashion' becomes 'mode' (synonyms).
'line' becomes 'l' (used when specifying particular lines from a poem).
'scale'+'mode'+'l'='SCALE MODEL'
'implying' is the link.
(Other definitions for scale model that I've seen before include "What an architect may have built" , "Perhaps an orrery" , "faithful representation" , "Smaller representation" , "It's not the real thing" .)