Show up with a paper model (6)
I believe the answer is:
appear
'show up' is the definition.
(both can mean to arrive)
'with a paper model' is the wordplay.
'with' indicates putting letters inside.
'model' indicates anagramming the letters.
'paper' anagrammed gives 'apper'.
'a' put within 'apper' is 'APPEAR'.
(Other definitions for appear that I've seen before include "hove in sight" , "Present oneself" , "be published" , "Come on the market" , "Become visible or seem" .)