Country house girl introducing European verse form (10)
I believe the answer is:
villanelle
'verse form' is the definition.
(type of poem)
'country house girl' is the wordplay.
'country house' becomes 'villa' (villa is a kind of country house).
'girl' becomes 'nelle' ().
'villa'+'nelle'='VILLANELLE'
'introducing european' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
(Other definitions for villanelle that I've seen before include "verse" , "Poem of nineteen lines" .)