Whale meat turned into flour (9)
I believe the answer is:
wheatmeal
'flour' is the definition.
(wheatmeal is a kind of flour)
'whale meat turned' is the wordplay.
'turned' indicates anagramming the letters.
'whale'+'meat'='whalemeat'
'whalemeat' is an anagram of 'WHEATMEAL'.
'into' acts as a link.
(Other definitions for wheatmeal that I've seen before include "Bread ingredient" , "Type of flour" .)