Get in touch with the French primary school to get visual aid (7,4)
I believe the answer is:
contact lens
'visual aid' is the definition.
(I've seen this before)
'get in touch with the french primary school to get' is the wordplay.
'get in touch with' becomes 'contact' (I've seen this in another clue).
'the french' becomes 'les' (plural form of 'the' in French).
'primary school' becomes 'n' (I can't justify this - if you can you should believe this answer much more).
'to get' indicates putting letters inside.
'les' placed around 'n' is 'lens'.
'contact'+'lens'='CONTACT LENS'
Can you help me to learn more?
(Other definitions for contact lens that I've seen before include "you're supposed to see through it" , "Visual aid" , "Aid to vision" , "Vision corrector" , "Eyesight corrector" .)