Rubbish turned up in metal skip (5)
I believe the answer is:
slate
'rubbish' is the definition.
(I've seen this before)
'turned up in metal skip' is the wordplay.
'turned up' is a reversal indicator.
'in' indicates a hidden word.
'etals' is hidden within 'metal skip'.
'etals' in reverse letter order is 'SLATE'.
(Other definitions for slate that I've seen before include "Metamorphic rock that can be split into thin layers" , "Blast" , "Rubbish" , "Stone used for roofing" , "Grey stone; tab" .)