Brag noisily of small bet involving golf (7)
I believe the answer is:
'brag noisily' is the definition.
'swagger' can be an answer for 'brag' (thesaurus). I am not sure about the 'noisily' bit.
'small bet involving golf' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'bet' becomes 'wager' (synonyms).
'involving' means one lot of letters goes inside another.
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'wager' going around 'g' is 'wagger'.
'of' is the link.
Can you help me to learn more?
(Other definitions for swagger that I've seen before include "Lofty proud gait" , "Show off" , "Walk proudly" , "Blustering arrogance" , "Walk self-importantly, strut" .)