Set up a base (6)
I believe the answer is:
encamp
'set up a base' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for encamp that I've seen before include "Settle into a tent" , "Set up tents" , "Go in for canvassing" , "Settle under canvas" , "Put up tents" .)