Greek article containing nothing about Russian composer (6)
I believe the answer is:
glinka
'russian composer' is the definition.
(I've seen this before)
'greek article containing nothing about' is the wordplay.
'greek' becomes 'gk'.
'article' becomes 'a' (indefinite article).
'containing' means one lot of letters goes inside another.
'nothing' becomes 'nil' ('nil' can be a synonym of 'nothing'**).
'about' says the letters should be written in reverse.
'nil' in reverse letter order is 'lin'.
'gk'+'a'='gka'
'gka' placed around 'lin' is 'GLINKA'.
(Other definitions for glinka that I've seen before include "Russian composer (Ruslan and Ludmilla)" , "Russian composer, d. 1857" , "Russian composer (A Life for the Tsar)" .)