Bubble raised on the skin (7)
I believe the answer is:
blister
'bubble raised on the skin' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for blister that I've seen before include "Bubble-like swelling on skin" , "Effect of rubbing on skin" , "Thin bubble on the skin" , "Bristle (anag.)" , "that's swelled up" .)