Rubbish bags leaking at home, first of all (4)
I believe the answer is:
blah
'rubbish' is the definition.
'bags leaking at home first of all' is the wordplay.
'first of all' indicates taking the first letters.
The initial letters of 'bags leaking at home' is 'BLAH'.
(Other definitions for blah that I've seen before include "Pretentious waffle" , "Dull" , "Meaningless substitute for tedious words" , "Claptrap" , "Stupid 20" .)