Grey as lady-bird? (5)
I believe the answer is:
ashen
'grey' is the definition.
(I've seen this before)
'as lady-bird?' is the wordplay.
'lady bird?' becomes 'hen' (I've seen this in another clue).
'as'+'hen'='ASHEN'
(Other definitions for ashen that I've seen before include "bleached" , "Pale (faced)" , "Anaemic-looking" , "Wan - wooden - pallid" , "Grey in colour" .)