Showing off stout with no head at a party (7)
I believe the answer is:
bravado
'showing off' is the definition.
(I've seen this before)
'stout with no head at a party' is the wordplay.
'stout with no head at' becomes 'brava' (I can't justify this - if you can you should believe this answer much more).
'a party' becomes 'do' (do is a kind of party).
'brava'+'do'='BRAVADO'
Can you help me to learn more?
(Other definitions for bravado that I've seen before include "Showy boldness" , "Display of confidence or daring, often boastful and insincere" , "Boastful show" , "Swaggering show of boldness" , "Swaggering confidence" .)