Mentioning hair band, sounded like an ass (6)
I believe the answer is:
brayed
'sounded like an ass' is the definition.
'mentioning hair band' is the wordplay.
'mentioning' indicates a 'sounds like' (homophone) clue.
'hair band' becomes 'braid'.
'braid' sounds like 'BRAYED'.
(Other definitions for brayed that I've seen before include "Laughed like a donkey" , "Hee-hawed" , "made an ass-like sound" , "Made sound like donkey" , "made a beastly noise" .)