Girl to do wrong with, in a deluge (5)
I believe the answer is:
flood
'a deluge' is the definition.
(synonyms)
'girl to do wrong' is the wordplay.
'girl' becomes 'flo' (short for Florence).
'to' is a charade indicator (letters next to each other).
'wrong' is an anagram indicator.
'do' anagrammed gives 'od'.
'flo'+'od'='FLOOD'
'with in' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for flood that I've seen before include "swamp" , "Oversupply" , "Deluge" , "Inundation" , "Light" .)