Pitch tents in spots put up by politician (6)
I believe the answer is:
encamp
'pitch tents' is the definition.
(I've seen this in another clue)
'spots put up by politician' is the wordplay.
'spots' becomes 'acne' (skin condition causing spots).
'put up' says the letters should be written backwards.
'by' is a charade indicator (letters next to each other).
'politician' becomes 'MP' (Member of Parliament).
'acne' in reverse letter order is 'enca'.
'enca'+'mp'='ENCAMP'
'in' is the link.
(Other definitions for encamp that I've seen before include "Establish a tented site" , "Go in for canvassing" , "Bivouac" , "Settle under canvas" , "Pitch tents" .)