Model order given to disciplined setter perhaps (3)
I believe the answer is:
sit
'model' is the definition.
(e.g. for a painting)
'order given to disciplined setter perhaps' is the wordplay.
I cannot quite understand how this works, but
'setter' could be 'i' (the person that set the crossword) and 'i' is found in the answer.
The remaining letters 'st' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sit that I've seen before include "Take a pew, an exam" , "(Of bird) stay on nest" , "Order dog to behave" , "I sell badly the cotton yarn" , "Serve (on jury)" .)