Bread? It’s served up with tea and a little butter (8)
I believe the answer is:
chapatti
'bread?' is the definition.
(chapatti is a kind of bread)
'it's served up with tea and a little butter' is the wordplay.
'served up' shows that the letters should be reversed in order.
'with' says to put letters next to each other.
'tea' becomes 'cha' (cha is a type of tea).
'and' means one lot of letters go next to another.
'a little butter' becomes 'pat' ('pat' can mean a lump of butter).
'it' reversed gives 'ti'.
'cha'+'pat'='chapat'
'ti' put after 'chapat' is 'CHAPATTI'.
(Other definitions for chapatti that I've seen before include "Feature of Indian cuisine" , "Flat pancake-like Indian bread" , "Indian pancake of unleavened wholemeal bread" , "food" .)