Chap wearing jumper, first in Versace’s Russian line (7)
I believe the answer is:
romanov
'russian line' is the definition.
'Romanov' can be an answer for 'line' (Romanov is an example). I'm not sure about the 'russian' bit.
'chap wearing jumper first in versace's' is the wordplay.
'chap' becomes 'Man' (chap can mean a man).
'wearing' means one lot of letters goes inside another.
'jumper' becomes 'roo' (I've seen this before).
'first in versace's' becomes 'v' (1st letter of 'versace').
'man' placed within 'roo' is 'romano'.
'romano'+'v'='ROMANOV'
Can you help me to learn more?
(Other definitions for romanov that I've seen before include "(Member of) Russian imperial dynasty" , "Tsarist dynasty" , "Family name of tsars" , "Russian emperor" , "Russian imperial line that ruled from 1613 to 1917" .)