Somewhat brassy, bilious hotelier's wife (5)
I believe the answer is:
sybil
'hotelier's wife' is the definition.
(Sybil Fawlty from Fawlty Towers)
'somewhat brassy bilious' is the wordplay.
'somewhat' indicates a hidden word.
'SYBIL' is hidden within 'brassy bilious'.
(Other definitions for sybil that I've seen before include "Dame - Thorndike, English actress" , "Basil Fawlty's wife" , "Female oracle; Mrs Fawlty" , "--- Thorndike, Fawlty" .)