Particular calipers twisted without right (7)
I believe the answer is:
special
'particular' is the definition.
(synonyms)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for special that I've seen before include "Day's non-menu dish" , "Particular, distinctive" , "Distinguished" , "Particular, peculiar" , "An addition to the standard menu" .)