Removing outer layers of eczema on nipple agitated old gasbag (8)
I believe the answer is:
zeppelin
'gasbag' is the definition.
(airship)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for zeppelin that I've seen before include "Type of airship" , "German inventor, designer of the first rigid motorised airship, d. 1917" , "Large inflatable" , "Cigar'" , "German inventor of dirigible airship" .)