Amphibian is a bit European (7)
I believe the answer is:
tadpole
'amphibian' is the definition.
(I have seen 'Young amphibian' mean 'tadpole' so perhaps 'amphibian' could also mean 'tadpole')
'a bit european' is the wordplay.
'a bit' becomes 'tad' (both can mean a small amount).
'european' becomes 'Pole' (someone from Poland).
'tad'+'pole'='TADPOLE'
'is' is the link.
(Other definitions for tadpole that I've seen before include "Aquatic larva of frog or toad" , "Larval toad" , "To plead for tiny frog" , "frog may spring from" , "Legless creature" .)