Anaemic friend takes cover (6)
I believe the answer is:
pallid
'anaemic' is the definition.
(I've seen this before)
'friend takes cover' is the wordplay.
'friend' becomes 'pal' (pal is a kind of friend).
'takes' means one lot of letters go next to another.
'cover' becomes 'lid' (lid is a kind of cover**).
'pal'+'lid'='PALLID'
(Other definitions for pallid that I've seen before include "Pale, insipid" , "Pale and wan (6)" , "lacking colour or brightness" , "White in face, perhaps ill" , "Insipid; lacking colour" .)