Junk that is ignored by husband (3)
I believe the answer is:
tat
'junk' is the definition.
(I've seen this before)
'that is ignored by husband' is the wordplay.
'is ignored by' indicates named letters should be taken away.
'husband' becomes 'h'.
'that' with 'h' removed is 'TAT'.
(Other definitions for tat that I've seen before include "Make lace; tasteless stuff" , "Shoddy articles" , "Tastelessly ornate things" , "Shoddy article" , "piece of needlework?" .)