Moving camp with enlisted moving (12)
I believe the answer is:
displacement
'moving' is the definition.
(thesaurus)
'camp with enlisted moving' is the wordplay.
'with' is a charade indicator (letters next to each other).
'moving' indicates an anagram.
'camp' put after 'enlisted' is 'enlistedcamp'.
'enlistedcamp' is an anagram of 'DISPLACEMENT'.
(Other definitions for displacement that I've seen before include "Amount of movement" , "Shift in position" , "Measure of ship's size" .)