Zeppelin possibly playing, showing wildness (7)
I believe the answer is:
abandon
'wildness' is the definition.
(synonyms)
'zeppelin possibly playing' is the wordplay.
'zeppelin possibly' becomes 'aband' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'playing' becomes 'on'.
'aband'+'on'='ABANDON'
'showing' is the link.
Can you help me to learn more?
(Other definitions for abandon that I've seen before include "Desert; give up (action)" , "Desert; lack of restraint" , "Total lack of inhibition (often gay?)" , "Forsake - careless freedom" , "Give up; leave behind" .)