Bread from dining room sent back after tea (7)

'bread' is the definition.
(type of bread loaf)

'dining room sent back after tea' is the wordplay.
'dining room' becomes 'hall' (as in a dinner hall).
'sent back' says the letters should be written in reverse.
'after' means one lot of letters go next to another.
'tea' becomes 'cha' (cha is a type of tea).
'hall' reversed gives 'llah'.
'llah' after 'cha' is 'CHALLAH'.

'from' acts as a link.