Husband follows peculiar scent or horrible smell (6)
I believe the answer is:
stench
'horrible smell' is the definition.
(I've seen this before)
'husband follows peculiar scent' is the wordplay.
'husband' becomes 'h'.
'follows' means one lot of letters go next to another.
'peculiar' indicates anagramming the letters (a peculiar or strange ordering of the letters).
'scent' is an anagram of 'stenc'.
'h' after 'stenc' is 'STENCH'.
'or' acts as a link.
(Other definitions for stench that I've seen before include "Evidence of corruption" , "Offensive odour" , "Stink" , "Foul odour" , "Strong unpleasant smell" .)