It's good about the French being pleased (4)
I believe the answer is:
glad
'being pleased' is the definition.
(similar in meaning)
'it's good about the french' is the wordplay.
'it's good' becomes 'g' (abbreviation).
'about' is a reversal indicator.
'the french' becomes 'dal' (I can't justify this - if you can you should give a lot more credence to this answer).
'dal' backwards is 'lad'.
'g'+'lad'='GLAD'
Can you help me to learn more?
(Other definitions for glad that I've seen before include "Dressy clothes, informally .... rags" , "More than willing" , "Not sorry" , "Pleased, delighted" , "Happy, pleased" .)