Ugly exfoliating skin rash problem caused by bug? (6)
I believe the answer is:
glitch
'bug?' is the definition.
('glitch' can be a synonym of 'bug')
'ugly exfoliating skin rash problem' is the wordplay.
I cannot really understand how this works, but
'rash problem' could be 'itch' (I've seen this in another clue) and 'itch' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'caused by' acts as a link.
Can you help me to learn more?
(Other definitions for glitch that I've seen before include "Technological problem" , "Flaw" , "Irregular computer failure" , "Fault (electronics)" , "An informal malfunction" .)
