Lady promoting European dairy product (4)
I believe the answer is:
edam
'dairy product' is the definition.
(Edam is an example)
'lady promoting european' is the wordplay.
'lady' becomes 'Eda'.
'promoting european' becomes 'm' (I am not sure about this - if you are sure you should believe this answer much more).
'eda'+'m'='EDAM'
Can you help me to learn more?
(Other definitions for edam that I've seen before include "Kind of cheese" , "Dutch 8 across" , "Made into a nice cheese" , "Danish cheese" , "Round, yellow cheese" .)