Came with right varied new contrivance (7)
I believe the answer is:
arrived
'came' is the definition.
('arrive' can be a synonym of 'come')
'with right varied new contrivance' is the wordplay.
'with' says to put letters next to each other.
'right' becomes 'ar' (I've seen this in other clues).
'varied new contrivance' becomes 'rived' (I can't explain this - if you can you should give a lot more credence to this answer).
'ar' next to 'rived' is 'ARRIVED'.
Can you help me to learn more?
(Other definitions for arrived that I've seen before include "A driver (anag.)" , "completed the journey" , "Reached a destination" , "Came" .)