Metal objects drifting in water (7)
I believe the answer is:
tinware
'metal objects' is the definition.
(items made from tin)
'drifting in water' is the wordplay.
'drifting' indicates anagramming the letters.
'in'+'water'='inwater'
'inwater' is an anagram of 'TINWARE'.
(Other definitions for tinware that I've seen before include "Articles made of metal plate - wet rain (anag)" , "Metal utensils" , "Metal objects" , "Cheap material" , "Metal items" .)