Husband with rather loose garment (5)
I believe the answer is:
habit
'loose garment' is the definition.
'habit' can be an answer for 'garment' (habiting is a kind of garmenting). I'm unsure of the 'loose' bit.
'husband with rather' is the wordplay.
'husband' becomes 'h'.
'with' means one lot of letters go next to another.
'rather' becomes 'a bit' ('a bit' can mean rather or to some extent).
'h'+'abit'='HABIT'
Can you help me to learn more?
(Other definitions for habit that I've seen before include "bent" , "can cause addiction" , "Acquired pattern of behaviour" , "Routine - clothing" , "Regular practice" .)