Refuse right to sleep rough outside (5)
I believe the answer is:
dross
'refuse' is the definition.
(thesaurus)
'right to sleep rough outside' is the wordplay.
'right' becomes 'r' (common abbreviation).
'to sleep rough' becomes 'doss' (I've seen this before).
'outside' indicates putting letters inside.
'r' inserted inside 'doss' is 'DROSS'.
(Other definitions for dross that I've seen before include "Anything worthless" , "It's Poor" , "Scum on molten metals" , "Worthless matter" , "Impurity" .)