Flatten bread (4)

I believe the answer is:

roll

This clue is a double definition.

'flatten' is the first definition.
(rolling is a kind of flattening)

'bread' is the second definition.
(roll is a kind of bread)

(Other definitions for roll that I've seen before include "Register - for continental breakfast?" , "start a revolution" , "Official list; cylinder" , "bakery's product" , "Barm cake" .)

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app