Answer is the name of a bird
Could this be us in a muddle (3)
Rather a big victim (6)
Nothing is on fire (8)
Just the thing for a celebration (7)
Surely not - it should be green (8)
A water dweller with a land speed record (7)
A fish with top billing (8)
I agree that muddle indicates an anagram, cashier, but AUK one is not really an anagram unless it means anagram of A in UK (ie of UAK), but it seems clumsy to me.
EMU still looks good- I thing I prefer the U and ME parsing to the bEMUsed one