English cissy'd bungle casting off cover (7)

I believe the answer is:

ecdysis

I'm a little stuck... Click here to teach me more about this clue!

'english cissy'd bungle casting off cover' is the definition.
I can't judge whether this defines the answer.

'english cissy'd bungle' is the wordplay.
'english' becomes 'E' (abbreviation).
'bungle' is an anagram indicator (I've seen 'bungled' mean this).
'cissyd' anagrammed gives 'cdysis'.
'e'+'cdysis'='ECDYSIS'

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

Want a hint initially instead of a full solution? Install my app