Russian leader travelling in style (7)
I believe the answer is:
yeltsin
'russian leader' is the definition.
(Boris Yeltsin)
'travelling in style' is the wordplay.
'travelling' indicates anagramming the letters.
'in'+'style'='instyle'
'instyle' anagrammed gives 'YELTSIN'.
(Other definitions for yeltsin that I've seen before include "Borris ......., former President of Russia" , "Russian leader" , "Boris --, former Russian politician" , "Russian president, d. 2007" , "Former leader" .)