Where life is hectic and loud, sealant is used (4,4)
I believe the answer is:
fast lane
'where life is hectic' is the definition.
(I've seen this before)
'loud sealant is used' is the wordplay.
'loud' becomes 'f' (short for forte - 'loud' in music).
'is used' is an anagram indicator.
'sealant' with letters rearranged gives 'astlane'.
'f'+'astlane'='FAST LANE'
'and' acts as a link.
(Other definitions for fast lane that I've seen before include "Style of living categorised by recklessness and dissipation" , "The quick way ..." , "unduly hasty driver appears here?" , "Where life is hectic" , "hurrying along this?" .)