Model I stick up? No way (3,1,3)
I believe the answer is:
not a bit
'no way' is the definition.
'model i stick up?' is the wordplay.
'model' becomes 't' (Ford Model T car).
'stick' becomes 'baton' (I've seen this before).
'up?' says the letters should be written backwards (in down clue: letters go upwards).
't'+'i'+'baton'='tibaton'
'tibaton' back-to-front is 'NOT A BIT'.
(Other definitions for not a bit that I've seen before include "In to bat (anag)" , "None" , "In no way - far from it" .)