Drop of continental perfume (7)
I believe the answer is:
descent
'drop' is the definition.
(I've seen this before)
'of continental perfume' is the wordplay.
'of continental' becomes 'de' ('of' in French).
'perfume' becomes 'scent' (synonyms).
'de'+'scent'='DESCENT'
(Other definitions for descent that I've seen before include "Roots" , "Ancestry - downward move" , "Lineage" , "Decline" , "Pedigree" .)