Cause friction again with hot pants (7)
I believe the answer is:
rubbish
'pants' is the definition.
(both can mean low quality)
'cause friction again with hot' is the wordplay.
'cause friction' becomes 'rub' (I've seen this before).
'again' becomes 'bis' (I've seen this in other clues).
'with' means one lot of letters go next to another.
'hot' becomes 'h' (abbreviation eg on taps).
'rub'+'bis'+'h'='RUBBISH'
(Other definitions for rubbish that I've seen before include "Refuse, litter" , "Garbage or trash" , "Stuff and nonsense" , "Nonsense and garbage (7)" , "Pan" .)