Oliver Cromwell's unbeauty spots? (5)

I believe the answer is:
warts
'spots?' is the definition.
The definition and answer can be both human attributes as well as being plural nouns.
Maybe you can see an association between them that I can't see?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for warts that I've seen before include "feature prominently on 12,14 across [UGLY SISTERS]" , "Verrucas" , "unwanted lumps" , "Skin growths" .)
