See good woman overcome by simple pleasure (7)
I believe the answer is:
ecstasy
'pleasure' is the definition.
(I have seen 'Great pleasure ' mean 'ecstasy' so perhaps 'pleasure' could also mean 'ecstasy')
'see good woman overcome by simple' is the wordplay.
'see' becomes 'C' (the word for the letter, according to Chambers).
'good woman' becomes 'st' (saint).
'overcome by' is an insertion indicator.
'simple' becomes 'easy' (similar in meaning).
'c'+'st'='cst'
'cst' placed into 'easy' is 'ECSTASY'.
(Other definitions for ecstasy that I've seen before include "State of euphoria and drug that induces it" , "Powerful hallucinatory drug" , "Feeling of intense delight, or stimulant drug" , "Feeling of great rapture" , "Emotional state; drug" .)