So who's revolted by very loud bigmouth? (4-3)
I believe the answer is:
show-off
'so who's revolted by very loud bigmouth?' is the definition.
I can't tell whether this definition defines the answer.
'so who's revolted by very loud' is the wordplay.
'revolted' indicates an anagram (I've seen 'revolt' mean this).
'by' is a charade indicator (letters next to each other).
'very loud' becomes 'ff' (musical abbreviation).
'so'+'who'='sowho'
'sowho' anagrammed gives 'showo'.
'showo'+'ff'='SHOW-OFF'
Can you help me to learn more?
(Another definition for show-off that I've seen is " Ostentatious exhibitionist".)