Amuses the French after correct mark (7)
I believe the answer is:
tickles
'amuses' is the definition.
(I've seen this before)
'the french after correct mark' is the wordplay.
'the french' becomes 'les' (plural form of 'the' in French).
'after' says to put letters next to each other.
'correct mark' becomes 'tick' (I've seen this before. I am not sure about the 'correct' bit.).
'les' put after 'tick' is 'TICKLES'.
Can you help me to learn more?
(Other definitions for tickles that I've seen before include "Excites" , "Light touches that cause laughter" , "Soft touches" , "Amuses" .)