Bit of high culture in Latvia, a rat dancing (2,8)
I believe the answer is:
la traviata
'bit of high culture' is the definition.
(Opera)
'latvia a rat dancing' is the wordplay.
'dancing' indicates anagramming the letters.
'latvia'+'a'+'rat'='latviaarat'
'latviaarat' is an anagram of 'LA TRAVIATA'.
'in' is the link.
(Other definitions for la traviata that I've seen before include "Verdi opera" , "work" , "Verdi's Dumas opera" .)