You shouldn’t miss this model (6)
I believe the answer is:
sitter
'this model' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for sitter that I've seen before include "Model - childminder" , "One posing for artist" , "eyed by a drawer?" , "broody type" , "Extremely easy task" .)