Family member you heard laugh creates uproar (8)
I believe the answer is:
brouhaha
'uproar' is the definition.
(I know that uproar can be written as brouhaha)
'family member you heard laugh' is the wordplay.
'family member' becomes 'bro' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'heard' indicates a 'sounds like' (homophone) clue.
'laugh' becomes 'haha' (ha-ha is a laughing sound).
'you' sounds like 'u'.
'bro'+'u'+'haha'='BROUHAHA'
'creates' is the link.
Can you help me to learn more?
(Other definitions for brouhaha that I've seen before include "Noisy, excited and confused commotion" , "Turmoil" , "Loud, confused noise" , "Kind of commotion - ends in laughter?" , "Stir" .)