Like a river: nothing to do with the ears (7)
I believe the answer is:
nilotic
'like a river' is the definition.
I can't tell whether this definition defines the answer.
'nothing to do with the ears' is the wordplay.
'nothing' becomes 'nil' (eg nil is zero in football).
'do' indicates an anagram (I've seen 'done' mean this).
'with' says to put letters next to each other.
'the ears' becomes 'ic' (I can't justify this - if you can you should give a lot more credence to this answer).
'to' anagrammed gives 'ot'.
'nil'+'ot'+'ic'='NILOTIC'
Can you help me to learn more?
(Other definitions for nilotic that I've seen before include "Group of East African languages" , "In Africa such tongues" , "Of Africa's longest river" , "tongue of Africans" , "of African people" .)