Weak giving comrade cover (6)
I believe the answer is:
pallid
'weak' is the definition.
('pallid' can be similar in meaning to 'weak')
'giving comrade cover' is the wordplay.
'giving' means one lot of letters go next to another.
'comrade' becomes 'pal' (I've seen this in other clues).
'cover' becomes 'lid' (lid is a kind of cover**).
'pal' put next to 'lid' is 'PALLID'.
(Other definitions for pallid that I've seen before include "Colourless, wan" , "Feeble, insipid" , "lacking colour or brightness" , "Pale, insipid" , "Insipid; lacking colour" .)