Journalist with 'no weight' rejected: fair? (6)
I believe the answer is:
blonde
'fair?' is the definition.
('blonde' can be similar in meaning to 'fair')
'journalist with no weight rejected' is the wordplay.
'journalist' becomes 'ed' (short for editor).
'with' means one lot of letters go next to another.
'weight' becomes 'lb' (lb is a kind of weight).
'rejected' says the letters should be written backwards.
'ed'+'no'+'lb'='ednolb'
'ednolb' in reverse letter order is 'BLONDE'.
(Other definitions for blonde that I've seen before include "Flaxen" , "Fair-headed" , "Pale-haired" , "Light-haired woman" , "Of a woman, having fair hair (6)" .)