Scottish town to impose restrictions on very loud music? (5)
I believe the answer is:
banff
'scottish town' is the definition.
'to impose restrictions on very loud music?' is the wordplay.
'to impose restrictions on' becomes 'ban'.
'very loud music?' becomes 'ff' (musical abbreviation for very loud).
'ban'+'ff'='BANFF'
(Other definitions for banff that I've seen before include "Scots community" , "Historic county town in Grampian" , "Canadian resort" , "Canadian town" , "Scottish North Sea port" .)