Heard bucket faded (4)
I believe the answer is:
pale
'faded' is the definition.
(I've seen this in another clue)
'heard bucket' is the wordplay.
'heard' shows a homophone (sound like).
'bucket' becomes 'pail' (synonyms).
'pail' sounds like 'PALE'.
(Other definitions for pale that I've seen before include "White" , "Without much colour" , "beyond which one is out of line?" , "livid" , "Wan; boundary" .)