Cleaner near sea in France, one seeking to please (7)
I believe the answer is:
charmer
'one seeking to please' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'cleaner near sea in france' is the wordplay.
'cleaner' becomes 'char' (char can mean a cleaner).
'near' means one lot of letters go next to another.
'sea in france' becomes 'mer' ('sea' in French).
'char'+'mer'='CHARMER'
Can you help me to learn more?
(Other definitions for charmer that I've seen before include "Smoothie" , "A delightful girl" , "relied on for a spell?" , "One having magical effect" , "Smooth talker" .)