Long snakes crushed by serpent somewhere in Italy (7)
I believe the answer is:
bologna
'in italy' is the definition.
('Bologna' is part of 'italy')
'long snakes crushed by serpent' is the wordplay.
'snakes' indicates an anagram (letters snake around).
'crushed by' is an insertion indicator.
'serpent' becomes 'boa' (boa is a kind of serpent).
'long' anagrammed gives 'logn'.
'logn' placed into 'boa' is 'BOLOGNA'.
'somewhere' acts as a link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for bologna that I've seen before include "Italian province" , "Capital of Emilia-Romagna" , "North Italian university city" , "Italian city - smoked sausage" .)