Nipper moved prince (6)
I believe the answer is:
Here is my best explanation:
'nipper' is the definition.
('pincer' can be a synonym of 'nipper')
'moved prince' is the wordplay.
'moved' indicates anagramming the letters.
'prince' with letters rearranged gives 'PINCER'.
(Other definitions for pincer that I've seen before include "Grasping limb of a crustacean", "Surrounding (movement)", "Nipper", "Crab's nipper", "Lobster's claw", "Crab's claw", "Claw, nipper", "Front claw" and "This movement is a converging attack".)