Rubbish put back in metal skip (5)
I believe the answer is:
slate
'rubbish' is the definition.
(I've seen this before)
'back in metal skip' is the wordplay.
'back' says the letters should be written in reverse.
'in' indicates the answer is hidden within the clue.
'etals' can be found hidden inside 'metal skip'.
'etals' in reverse letter order is 'SLATE'.
'put' acts as a link.
(Other definitions for slate that I've seen before include "rock used in building" , "A roof-tile; criticise heavily" , "Criticise - outdated school equipment" , "Scold; hard rock" , "Roofing tile" .)