Virgin excited by capital composer (6,6)
I believe the answer is:
irving berlin
'composer' is the definition.
(American composer, 1888-1989)
'virgin excited by capital' is the wordplay.
'excited' indicates anagramming the letters.
'by' means one lot of letters go next to another.
'capital' becomes 'berlin' (capital of Germany).
'virgin' is an anagram of 'irving'.
'irving'+'berlin'='IRVING BERLIN'
(Other definitions for irving berlin that I've seen before include "Composer" , "originator of White Christmas" , "songwriter" .)