Anaemic looking (5)
I believe the answer is:
ashen
'anaemic looking' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ashen that I've seen before include "Pale-faced" , "Wan, pale" , "(Of face) pale (with shock)" , "Pale (faced)" , "'Very pale, from shock say (5)'" .)