Boast made by German after chat about restricting weight (7)
I believe the answer is:
swagger
'boast' is the definition.
(thesaurus)
'german after chat about restricting weight' is the wordplay.
'german' becomes 'ger' (abbreviation).
'after' is a charade indicator (letters next to each other).
'chat about' becomes 'sag' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'restricting' means one lot of letters goes inside another.
'weight' becomes 'w'.
'sag' going around 'w' is 'swag'.
'ger' put after 'swag' is 'SWAGGER'.
'made by' acts as a link.
Can you help me to learn more?
(Other definitions for swagger that I've seen before include "Walk arrogantly" , "Blustering arrogance" , "Show off" , "Arrogant gait" , "Walk self-importantly, strut" .)