Slip extremely energetic bounder into capsule with oxygen (10)
I believe the answer is:
peccadillo
'slip' is the definition.
(I've seen this in another clue)
'extremely energetic bounder into capsule with oxygen' is the wordplay.
I cannot really understand how this works, but
'bounder' could be 'cad' (synonyms) and 'cad' is located in the answer.
'oxygen' could be 'o' (O is the chemical symbol for oxygen) and 'o' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for peccadillo that I've seen before include "Minor offence" , "A little wrong" , "Trifling fault - I called cop (anag)" , "foible" , "petty misdemeanour" .)