Drained of blood - like poultry (5)
I believe the answer is:
ashen
'drained of blood' is the definition.
(I've seen this in another clue)
'like poultry' is the wordplay.
'like' becomes 'as'.
'poultry' becomes 'hen' (hen is a kind of poultry).
'as'+'hen'='ASHEN'
(Other definitions for ashen that I've seen before include "bleached" , "Having gone pale" , "Livid" , "Very pale, with shock or fear" , "may be pale with shock" .)