European region's loud people being grounded (8)
I believe the answer is:
flanders
'european region's' is the definition.
(region of Belgium)
'loud people being grounded' is the wordplay.
'loud' becomes 'f' (short for forte - 'loud' in music).
'people being grounded' becomes 'landers' (people landing on the ground).
'f'+'landers'='FLANDERS'
(Other definitions for flanders that I've seen before include "See 1" , "Historic European region, now divided between Belgium, the Netherlands and France" , "Battlefield" , "Heroine of eighteenth century" , "Medieval principality, now part of Belgium, the Netherlands and France" .)