Beef served up to newspaper girl (5)
I believe the answer is:
naomi
'girl' is the definition.
'beef served up to newspaper' is the wordplay.
'beef' becomes 'moan' (I've seen this before).
'served up' shows that the letters should be reversed in order.
'to newspaper' becomes 'i' (UK newspaper).
'moan' backwards is 'naom'.
'naom'+'i'='NAOMI'
(Other definitions for naomi that I've seen before include "woman's name" , "Girl" , "Relative of Ruth" , "- - Campbell, supermodel" , "Biblical woman" .)