a. Famous fiddler
b. “The brave of the bravest”
c. Dazzling light
d. European city

By adding 2 letters to each of the words (not the same letters) defined by the above clues and scrambling all the letters create 4 new words matching the definitions below:

a. fruit
b. coin
c. country
d. drug

Permuting the 8 added letters one gets the name of another famous violinist.

Based on a concept of puzzle #177 of “Penguins problems book” ed. 1940.