Beastly utterance about public house shows pizzazz (5)
I believe the answer is:
oomph
'pizzazz' is the definition.
(I know that pizzazz can be written as oomph)
'beastly utterance about public house' is the wordplay.
'beastly utterance' becomes 'moo' (sound made by a cow).
'about' says the letters should be written in reverse.
'public house' becomes 'ph' (abbreviation).
'moo' reversed gives 'oom'.
'oom'+'ph'='OOMPH'
'shows' acts as a link.
(Other definitions for oomph that I've seen before include "drive" , "Dynamism" , "attractiveness" , "15 [SEXINESS]" , "Enthusiasm - vigour - sex appeal" .)