See cinders sifted (7)
I believe the answer is:
discern
'see' is the definition.
(I've seen this before)
'cinders sifted' is the wordplay.
'sifted' indicates an anagram.
'cinders' anagrammed gives 'DISCERN'.
(Other definitions for discern that I've seen before include "Cinders (anag)" , "Recognise, find out" , "Detect" , "spot" , "Make out, distinguish by eye" .)