Seen to have rash? (7)
I believe the answer is:
spotted
'seen' is the definition.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for spotted that I've seen before include "- Dog; - dick" , "Saw; mottled" , "Observed" , "As Dick may be" , "Saw; speckled" .)