Member behind review of spots to stay under canvas (6)
I believe the answer is:
encamp
'stay under canvas' is the definition.
(as in canvas tents)
'member behind review of spots' is the wordplay.
'member' becomes 'MP' (Member of Parliament).
'behind' means one lot of letters go next to another.
'review of' is a reversal indicator.
'spots' becomes 'acne' (skin condition causing spots).
'acne' reversed gives 'enca'.
'mp' put after 'enca' is 'ENCAMP'.
'to' is the link.
(Other definitions for encamp that I've seen before include "Go in for canvassing" , "Establish a tented site" , "Bivouac" , "Establish tented accommodation (for soldiers)" , "Settle under canvas" .)