One from France linked to some elements of higher mathematics? (6)
I believe the answer is:
fermat
'elements of higher mathematics?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'one from france linked to some' is the wordplay.
'one from' says to take the initial letters.
'linked' becomes 'erma' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'some' suggests taking the first letters.
The first letter of 'france' is 'f'.
The initial letter of 'to' is 't'.
'f'+'erma'+'t'='FERMAT'
(Other definitions for fermat that I've seen before include "French Mathematician (famous last theorem)" , "One with famous last theorem" , "he had no room to write down proof" .)