In general terms, NORX works combining a cryptographic hash function and an stream cipher. At the end of an encryption operation you end with a ciphered message plus its authenticated hash. If you call
AEADEnc() whith a zero length secret and postfix message, you basically get a hash function for each $(key, nonce)$ pair.
My question is, given a fixed and public $(key, nonce)$ pair, can NORX
AEADEnc() work as a secure cryptographic hash function?