Husband has slightly 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 am unsure of the 'loose' bit.
'husband has slightly' is the wordplay.
'husband' becomes 'h'.
'has' means one lot of letters go next to another.
'slightly' becomes 'a bit' (I've seen this in another clue).
'h'+'abit'='HABIT'
Can you help me to learn more?
(Other definitions for habit that I've seen before include "can cause addiction" , "Regular practice" , "Riding garment" , "Routine - clothing" , "Settled practice" .)